Option strategy: Call Backspread

Option strategiesThis strategy is also known as reverse call ratio spread, it is a bullish strategy that involves selling a number of call options  at lower strike price  and buying more call option of same underlying stocks at the higher strike price. 
Profit potential is unlimited when stock price makes a strong move to the upside beyond the upper break even point.
Profit =Price of underlying- strike price of Long call- Max loss.
The risk is limited and is taken when the  underlying stock price at expiration is at a strike price of the long calls purchased.