I don´t know the technical names for some of the stuff I´ve evolved for my own trading style. Generally I am using ( I think ) gambling theory. Using runs, I´m sliding with the action if it trends somewhat, but being options I don´t like to hold over five days and three is my preference. In a gambling run, when you are hot, you increase your bet each time. When you get hit, I drop back to one contract again. Until I have a couple of wins that tell me I have my edge, or timing skills back again, on whatever change the market has made to what it is doing. Then gradually start increasing bet size again. Usually measured by some parameter of money available above 50% of account capital, divided by the price of the contracts. Because of commissions, I first simply stick to one contract and buy IN THE MONEY, and keep increasing the in the money value of premium for as long as practical and then go to multiple contracts. This to allow commission costs to be as low as possible,when you are recovering from a hit. Waiting to get the rythm back in the market circumstances that have changed. If I can get a trend I like it. But otherwise will simply scalp with a fixed buy and sell order. Watching the volatility mostly, to tell me when to EXIT. The Day Trader rule caused me a lot of grief when they slapped me with the restriction. But I do believe I´ve adjusted to it now? We shall see as the next few months pass.