Quote from Swan Noir:
Many good and interesting thoughts expressed yet the OP (and other newer traders) should understand that it is frequently not about the last thing or anything. Some of us had to learn the same damn lessons more than once and more than twice.
The earlier you can internalize what General George Patton said (at least in the movie!) the better off you are:
"I hate to retreat because I hate paying for the same damn real estate twice."
Once you learn "it", codify it and really make it yours. Don't pay for that RE (and we pay dearly for most every inch) and then revert back to your old habits. The right stuff is hard to find. Once you find a piece of it large or small hang on to it. You are solving a puzzle or, if you prefer, learning a language and you must not lose any pieces or forget any words or phrases.
My last piece was to remember to wait for very high quality trades and not execute the "almost". Quality in anything is scarce. If you are seeing a ton of trades there is a pretty fair chance that only a few will give you the hat trick.
For me the hat trick is:
1) A solid pedigree -- it originated in a place that you would expect a trade of its nature to come from;
2) it gives you a low or at least modest MAE;
3) it delivers a solid entry bar that shows you there is torque.
No matter how carefully you choose you are not going to get hat tricks all the time but you must expect a trade to deliver all three or you should pass. Setting the bar that high means that, in time, you can comfortably increase size. The ability to trade size based on consistency may not be heaven but it is not many blocks away.