Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Document Type

dei_DocumentType

497

Document Period End Date

dei_DocumentPeriodEndDate

Sep. 30, 2014

Registrant Name

dei_EntityRegistrantName

VIRTUS OPPORTUNITIES TRUST

Central Index Key

dei_EntityCentralIndexKey

0001005020

Amendment Flag

dei_AmendmentFlag

false

Trading Symbol

dei_TradingSymbol

VOT

Document Creation Date

dei_DocumentCreationDate

May 11, 2015

Document Effective Date

dei_DocumentEffectiveDate

May 11, 2015

Prospectus Date

rr_ProspectusDate

Jan. 28, 2015

Virtus Equity Trend Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Virtus Equity Trend Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The fund has an investment objective of long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

The tables below illustrate the fees and expenses that you may pay if you buy and hold shares of the fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Mutual Funds. More information about these and other discounts is available from your financial advisor and under “Sales Charges” on page 216 of the fund’s prospectus and “Alternative Purchase Arrangements” on page 108 of the fund’s statement of additional information.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 227% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

227.00%

Expenses Deferred Charges [Text Block]

rr_ExpensesDeferredChargesTextBlock

The deferred sales charge is imposed on Class C Shares redeemed during the first year only.

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in Virtus Mutual Funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

50,000

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Estimated for current fiscal year, as annualized.

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect current management fee.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

Investments, Risks and Performance

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The fund utilizes a rules based investment process and may invest in securities representing the approximately 130 sub-sectors of the primary sectors of the S&P 500® Index and/or cash equivalents (high-quality short-term securities). Allocations to each sub-sector are based on quantitative models.

The fund has the flexibility to invest in any combination of the sub-sectors and high-quality short-term securities, or 100% in high-quality short-term securities. A relative strength momentum model is utilized to rank each sub-sector of the equity market. The fund will allocate to those sub-sectors that the model determines are more likely to outperform the broad market. A market risk indicator model is also used to determine whether the market is in a lower or higher level of risk based on price trends in the overall market. When the market is determined to be in a higher level of risk, a defensive cash equivalent position may be built by allocating from those sub-sectors of the market that are not exhibiting absolute positive momentum, up to 100% of fund assets.

The adviser is responsible for final model specification, portfolio construction, model monitoring, and governance. The subadviser, Euclid Advisors, LLC monitors the fund’s allocations to the underlying securities and is responsible for rebalancing assets to maintain target allocations among the underlying sub-sectors, while taking into account any other factors the subadviser may deem relevant, such as cash flow and/or timing considerations.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The fund may not achieve its objective, and it is not intended to be a complete investment program. The value of the fund’s investments that supports your share value may decrease. If between the time you purchase shares and the time you sell shares the value of the fund’s investments decreases, you will lose money. Investment values can decrease for a number of reasons. Conditions affecting the overall economy, specific industries or companies in which the fund invests can be worse than expected, and investments may fail to perform as the subadviser expects. As a result, the value of your shares may decrease. Purchase and redemption activities by fund shareholders may impact the management of the fund and its ability to achieve its investment objective(s). The redemption by one or more large shareholders or groups of shareholders of their holdings in the fund could have an adverse impact on the remaining shareholders in the fund including by accelerating the realization of capital gains and increasing the fund's transaction costs. The principal risks of investing in the fund are:

>

• Equity Securities Risk.  The risk that events negatively affecting issuers, industries or financial markets in which the fund invests, will impact the value of the stocks held by the fund and thus, the value of the fund’s shares over short or extended periods. Investments in a particular style or in small or medium-sized companies may enhance that risk.

>

• Market Volatility Risk.  The risk that the value of the securities in which the fund invests may go up or down in response to the prospects of individual companies and/or general economic conditions. Price changes may be temporary or may last for extended periods.

>

• Portfolio Turnover Risk.  The risk that the fund’s principal investment strategies will result in a consistently high portfolio turnover rate. See the Portfolio Turnover section above for more information about the impact that portfolio turnover can have on your investment.

>

• Quantitative Model Risk.  The risk that investments selected using quantitative models may perform differently from the market as a whole or from their expected performance. There can be no assurance that use of a quantitative model will enable the fund to achieve positive returns or outperform the market.

>

• Sector Focused Investing Risk.  The risk that events negatively affecting a particular industry or market sector in which the fund focuses its investments will cause the value of the fund’s shares to decrease, perhaps significantly.

>

• U.S. Government Securities Risk.  The risk that U.S. Government securities in the fund’s portfolio will be subject to price fluctuations, or that an agency or instrumentality will default on an obligation not backed by the full faith and credit of the United States.

Risk Lose Money [Text]

rr_RiskLoseMoney

If between the time you purchase shares and the time you sell shares the value of the fund’s investments decreases, you will lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The bar chart and table below provide some indication of the potential risks of investing in the fund. The fund’s past performance, before and after taxes, is not necessarily an indication of how the fund will perform in the future.

The bar chart shows the fund’s performance from year to year over the life of the fund. The table shows how the fund’s average annual returns compare to those of a broad-based securities market index. Updated performance information is available at virtus.com or by calling 800-243-1574.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows the fund’s performance from year to year over the life of the fund. The table shows how the fund’s average annual returns compare to those of a broad-based securities market index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

 800-243-1574

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

virtus.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The fund’s past performance, before and after taxes, is not necessarily an indication of how the fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar year total returns for Class A Shares

Bar Chart Narrative [Text Block]

rr_BarChartNarrativeTextBlock

Returns do not reflect sales charges and would be lower if they did.

Annual Return (%)

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

Returns do not reflect sales charges and would be lower if they did.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter: Q1/2013: 10.75% Worst Quarter: Q3/2011: -9.45%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended 12/31/14)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

rr_PerformanceTableNotRelevantToTaxDeferred

Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold fund shares in tax-deferred accounts or to shares held by non-taxable entities.

Performance Table One Class of after Tax Shown [Text]

rr_PerformanceTableOneClassOfAfterTaxShown

After-tax returns are shown only for Class A Shares; after-tax returns for other classes will vary.

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

Returns reflect deduction of maximum sales charges and full redemption at end of periods shown.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

The S&P 500® Index is a free-float adjusted market capitalization-weighted index of 500 of the largest U.S. companies. The index is calculated on a total return basis with dividends reinvested. The index is unmanaged and not available for direct investment.

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. After-tax returns are shown only for Class A Shares; after-tax returns for other classes will vary. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. After-tax returns are not relevant to investors who hold fund shares in tax-deferred accounts or to shares held by non-taxable entities. In certain cases, the Return After Taxes on Distributions and Sale of Fund Shares for a period may be higher than other return figures for the same period. This will occur when a capital loss is realized upon the sale of fund shares and provides an assumed tax benefit that increases the return.

Virtus Equity Trend Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

VAPAX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

^[1]

Distribution and Shareholder Servicing (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.51%

1 Year

rr_ExpenseExampleYear01

729

3 Years

rr_ExpenseExampleYear03

1,054

5 Years

rr_ExpenseExampleYear05

1,401

10 Years

rr_ExpenseExampleYear10

2,376

1 Year

rr_ExpenseExampleNoRedemptionYear01

729

3 Years

rr_ExpenseExampleNoRedemptionYear03

1,054

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,401

10 Years

rr_ExpenseExampleNoRedemptionYear10

2,376

2011

rr_AnnualReturn2011

(0.21%)

2012

rr_AnnualReturn2012

10.06%

2013

rr_AnnualReturn2013

29.24%

2014

rr_AnnualReturn2014

1.79%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2013

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

10.75%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(9.45%)

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

1 Year

rr_AverageAnnualReturnYear01

(4.06%)

Since Inception

rr_AverageAnnualReturnSinceInception

12.09%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 01, 2010

Virtus Equity Trend Fund | Class C

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

VAPCX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

1.00%

^[2]

Management Fees

rr_ManagementFeesOverAssets

1.00%

^[1]

Distribution and Shareholder Servicing (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

2.26%

1 Year

rr_ExpenseExampleYear01

339

3 Years

rr_ExpenseExampleYear03

736

5 Years

rr_ExpenseExampleYear05

1,260

10 Years

rr_ExpenseExampleYear10

2,696

1 Year

rr_ExpenseExampleNoRedemptionYear01

239

3 Years

rr_ExpenseExampleNoRedemptionYear03

736

5 Years

rr_ExpenseExampleNoRedemptionYear05

1,260

10 Years

rr_ExpenseExampleNoRedemptionYear10

2,696

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

1 Year

rr_AverageAnnualReturnYear01

0.96%

Since Inception

rr_AverageAnnualReturnSinceInception

12.71%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 01, 2010

Virtus Equity Trend Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

VAPIX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

^[1]

Distribution and Shareholder Servicing (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.26%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.26%

1 Year

rr_ExpenseExampleYear01

138

3 Years

rr_ExpenseExampleYear03

431

5 Years

rr_ExpenseExampleYear05

745

10 Years

rr_ExpenseExampleYear10

1,635

1 Year

rr_ExpenseExampleNoRedemptionYear01

138

3 Years

rr_ExpenseExampleNoRedemptionYear03

431

5 Years

rr_ExpenseExampleNoRedemptionYear05

745

10 Years

rr_ExpenseExampleNoRedemptionYear10

1,635

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

1 Year

rr_AverageAnnualReturnYear01

2.03%

Since Inception

rr_AverageAnnualReturnSinceInception

13.84%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 01, 2010

Virtus Equity Trend Fund | Class R6

Risk/Return:

rr_RiskReturnAbstract

Trading Symbol

dei_TradingSymbol

VRPAX

Maximum Sales Charge (load) Imposed on Purchases (as a percentage of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (load) (as a percentage of the lesser of purchase price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

1.00%

^[1]

Distribution and Shareholder Servicing (12b-1) fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.19%

^[3]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.19%

1 Year

rr_ExpenseExampleYear01

131

3 Years

rr_ExpenseExampleYear03

409

5 Years

rr_ExpenseExampleYear05

708

10 Years

rr_ExpenseExampleYear10

1,556

1 Year

rr_ExpenseExampleNoRedemptionYear01

131

3 Years

rr_ExpenseExampleNoRedemptionYear03

409

5 Years

rr_ExpenseExampleNoRedemptionYear05

708

10 Years

rr_ExpenseExampleNoRedemptionYear10

1,556

Label

rr_AverageAnnualReturnLabel

Return Before Taxes

Since Inception

rr_AverageAnnualReturnSinceInception

(1.80%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 12, 2014

Virtus Equity Trend Fund | After Taxes on Distributions | Class A

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions

1 Year

rr_AverageAnnualReturnYear01

(9.34%)

Since Inception

rr_AverageAnnualReturnSinceInception

10.40%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 01, 2010

Virtus Equity Trend Fund | After Taxes on Distributions and Sales | Class A

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

Return After Taxes on Distributions and Sale of Fund Shares

1 Year

rr_AverageAnnualReturnYear01

0.91%

Since Inception

rr_AverageAnnualReturnSinceInception

9.41%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 01, 2010

Virtus Equity Trend Fund | S&P 500® Index

Risk/Return:

rr_RiskReturnAbstract

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses or taxes)

Label

rr_AverageAnnualReturnLabel

S&P 500​® Index (reflects no deduction for fees, expenses or taxes)

1 Year

rr_AverageAnnualReturnYear01

13.69%

Since Inception

rr_AverageAnnualReturnSinceInception

19.19%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 01, 2010

Virtus Equity Trend Fund | S&P 500® Index | Class R6

Risk/Return:

rr_RiskReturnAbstract

Label

rr_AverageAnnualReturnLabel

S&P 500​® Index (reflects no deduction for fees, expenses or taxes)

Since Inception

rr_AverageAnnualReturnSinceInception

1.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 12, 2014

[1] Restated to reflect current management fee.

[2] The deferred sales charge is imposed on Class C Shares redeemed during the first year only.

[3] Estimated for current fiscal year, as annualized.