Quote from Maverick74:
Once you are in a trade and the underlying moves, you have the opportunity to make adjustments that will create a positive expectancy. For example, say you buy an ATM straddle today in EBAY. Now this trade in and of itself has a negative expectancy. But let's say EBAY rallies 6 pts over the next 3 days. If you sell some of your long deltas there, you are creating a positive expectancy trade. Not by much, but you will be positive. What you are essentially doing here is locking in profits, but you are still in the trade and your adjustment has improved your trade.
Let's take another example. Say you bought some wings today in EBAY on both the call and put side. Now, let's say EBAY rallies 6 pts over the next week. Now you go in and sell some inside premium creating a condor. You now have a positive expectancy. In reality what you did was leg into a condor at really great prices. But once again, you moved the trade over to a positive expectancy trade. Now, just because you have positive expectancy does not mean you will make money. In fact, you only have a slightly positive expectancy. But you see the point.
So the idea is to put on trades that down the road will allow you to make positive adjustments to your trade.
Now something else to add here. The timing of the adjustment and what the adjustment is will be very important. You can't just do anything to your trade to create a positive expectancy. This is where great traders are made. A great trader manages his positions very well and always adds value to his trades.