I am not sure I understand your question but let me try. If you are long stock, long put you are synthetically long call. So in that case, I would just intiate a trade by buying the call at the strike of your long put. This way less execution risk, less commish. When you have the long synthetic, and then sell a call later on when price moves your way, you have basically a locked position called a conversion which will neither profit or lose anymore. I personally would rather use chart to make a price judgement call buy/sell option or spread options if you don;t like vol levels then just sell it outright. Conversions are fine if you are on the floor for inventory management purposes but you have to then deal with multiple unleggings if underlysing is close to stirke to avoid pin risk. Imagine the underlying being 25 cents near your strike with 2-3 days to go , and the spreads are 20 cents apart on the call/put, It would cost you a lot of money to get out of a position that essentially is dead money. I've tried gamma scalping w limited success due to the inactivity of the market lately. I know it is a valid strategy. A lot of floor traders I know have done it. The problem is the psychological makeup of the trader needed to cope with the equity curve. I know this one guy in coffee who can take a 4000 / week decay in coffee options knowing that he will make it many times over in case of a strike or a frost.I remember him making 250K in that week of a port strike. I have to fee 3 kids everyday, so I can't do that for now.
Even if optionvue has scans to judge hedges with an edge, it is not going to be valid since their scans is on a 20 min delay, these mispricings correct themselves in seconds. Best bet i to get a system which collects Real Time data in YOUr PC and scan them. Maybe create your own system using excel and DDE links.
Hope this helps