A call ratio backspread is a combination of short calls at an at-the-money strike price and long calls at a higher strike price. Both sets of options have the same expiration date. This trade is a bullish position. The premium received from selling the at-the-money calls is used to subsidize the purchase of the out-of-the-money calls.
Profits are unlimited on the upside and losses are limited to the net debit if futures are trading at-the-money or below at expiration. Any ratio spread could result in a credit or a debit, depending on how volatility affects options prices. Maximum loss occurs if the long options expire at the strike price.

Position Premium Dollar Premium Delta Sell one $20 crude oil call $1.17 $1,170 -.52 Buy two $21 crude oil calls - Net debit - Net delta $0.75 $0.33 $1,500 $660 +.76 +.24 Maximum risk $1,330 per position Maximum profit Unlimited on the upside Break-even futures price $22.33 Position Premium Dollar Premium Delta Sell one $260 gold call $6.70 $670 -.50 Buy two $270 gold calls - Net credit - Net delta $3.00 $0.70 $600 $560 +.60 +.10 Maximum risk $9.30 $930 Maximum profit Unlimited on the upside Break-even futures price $279.30
THERE IS A RISK OF LOSS IN FUTURES TRADING AND IS NOT SUITABLE FOR
ALL INVESTORS. ONLY RISK CAPITAL SHOULD BE USED WHEN TRADING FUTURES.
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