I am not expecting an exact answer on this....but, my method is very good at entering at the top, or bottom of an exhausting trend. Today is a good example. I sold an SPY call at $4.95 near the top. It went down and is currently trading around $4 so I am about $1 in the money. I like the trade and think it will eventually go down further. I also think we may get a bounce tomorrow. So how do I know when to take my $1 winner, or let it bounce against me, maybe as far as flat? There is about $3 in premium in it since I shorted it, this will come to me if it stays flat from here until its April expiration.