Unique option strategy

:Hey guys ..I have a option strategy on expiry ,half time I have earned from it and another half time I have loosed ...so pls guide me what extra can be added...
Suppose nifty is in 7500 on expiry day,
I will sell 7600 call quantity 1000,
And will sell 7400 put quantity 1000,
How many time it wld be that on expiry nifty will rally more than 100 point,
7600 call will be 2 rs
7400 put will be same .

Is it well startegy

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