REX Defensive Autocallable Income ETF AUTHORIZED PARTICIPANTS, MARKET MAKERS, AND LIQUIDITY PROVIDERS LIMITATION RISK [Member] AUTOCALLABLE CONTRACTS RISK [Member] COUPON BARRIER RISK [Member] RISK BUFFER RISK [Member] GEARING FACTOR RISK [Member] LADDERED AUTOCALLABLE CONTRACT RISK [Member] LIMITATION ON UPSIDE GAIN RISK [Member] CASH TRANSACTIONS RISK [Member] CORRELATION RISK [Member] COSTS OF BUYING AND SELLING FUND SHARES RISK [Member] CYBER SECURITY RISK [Member] DEBT SECURITIES RISK [Member] DERIVATIVES RISK [Member] SWAP AGREEMENTS RISK [Member] SWAP COUNTERPARTY RISK [Member] BOX SPREAD RISK [Member] FLEX OPTIONS RISK [Member] DISTRIBUTION RISK [Member] DISTRIBUTION TAX RISK [Member] EQUITY SECURITIES RISK [Member] HIGH PORTFOLIO TURNOVER RISK [Member] INDEX RISK [Member] INDEX PROVIDER RISK [Member] INFLATION RISK [Member] Interest Rate Risk [Member] LARGE CAPITALIZATION COMPANIES RISK [Member] LIQUIDITY RISK [Member] MARKET MAKER RISK [Member] MARKET RISK [Member] MONEY MARKET/SHORT-TERM SECURITIES RISK [Member] NEW FUND RISK [Member] NON-CORRELATION RISK [Member] OPERATIONAL RISK [Member] PASSIVE INVESTMENT RISK [Member] PREMIUM/DISCOUNT RISK [Member] SPECIAL TAX RISK [Member] TRADING ISSUES RISK [Member] U.S. GOVERNMENT SECURITIES RISK [Member] VALUATION RISK [Member] VOLATILITY RISK [Member] REX Defensive Autocallable Income ETF [Member] REX Defensive Autocallable Income ETF. REX Defensive Autocallable Income ETF. Volatility Risk. Valuation Risk. U.S. Government Securities Risk. Trading Issues Risk. Special Tax Risk. Premium/Discount Risk. Passive Investment Risk. Operational Risk. Non-Correlation Risk. New Fund Risk. Money Market/Short-Term Securities Risk. Market Risk. Market Maker Risk. Liquidity Risk. Large Capitalization Companies Risk. Inflation Risk. Index Provider Risk. Index Risk. High Portfolio Turnover Risk. Equity Securities Risk. Distribution Tax Risk. Distribution Risk. Flex Options Risk. Box Spread Risk. Swap Counterparty Risk. Swap Agreements Risk. Derivatives Risk. Debt Securities Risk. Cyber Security Risk. Costs Of Buying And Selling Fund Shares Risk. Correlation Risk. Cash Transactions Risk. Limitation On Upside Gain Risk. Laddered Autocallable Contract Risk. Gearing Factor Risk. Risk Buffer Risk. Coupon Barrier Risk. Autocallable Contracts Risk. Authorized Participants, Market Makers, And Liquidity Providers Limitation Risk.