Here is the scenario where I get assigned a stock say at 100, then I sell a call at 100 using one week expiry. Price will do what it does, goes and up, is there an optimal way to use the greek to know when we should close the sold call off with minimal lost as stock price is going up? The stock is making the gain but the call is losing, I want to take the stock appreciation so I would close off the call manually. and the lost is offset by the stock. Hope that makes sense.