how do i calculate

1) delta: you should know this already, just to have asked the question. What *is* delta?

2) Google: a serious boatload of information which (unlike so much on the Interwebs, and especially so w.r.t. trading/investing) is pretty reliable.

2.a.) shop for delta-gamma approximation,
or delta-gamma-theta approximation,
or Black Scholes Merton PDE for all of delta, gamma, theta, and vega.

2.b.) "tastytrade" videos will come up. The more-recent crop is pretty accurate.
 
1) delta: you should know this already, just to have asked the question. What *is* delta?

2) Google: a serious boatload of information which (unlike so much on the Interwebs, and especially so w.r.t. trading/investing) is pretty reliable.

2.a.) shop for delta-gamma approximation,
or delta-gamma-theta approximation,
or Black Scholes Merton PDE for all of delta, gamma, theta, and vega.

2.b.) "tastytrade" videos will come up. The more-recent crop is pretty accurate.
@tommcginnis thanks
 
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