Dear Little Lex,
I was browsing the net in search of my own advice and I saw your thread!
With all due respect, I want to help you. I couldn't help but to reply.
First of all, I've been trading for a little longer than you. I've gone through painful learning lessons and I've also banked a lot of $$ on YM NQ ES.
YM is hard to trade because it's wicked fast. But keep trading it, because you will find a method that will allow you to make bigger and better profits.
You MUST shoot for profits of, 100-250 points, and even bigger 500 pt trades.
100-200 points is actually easier than you think! There are indicators that you combine with S&R levels to get a broad sweeping signal to catch BIG points.
I won't tell you my system, as you must find it yourself. I never had the mentor to hand it down to me...I found it after losing, winning, and losing more.
Today I took over 200 points out of the YM and I even took a few out of NQ on the side. These large point gains are very feasible, even with a relatively tight stop.
try using a 133 tick chart with some different moving averages to find bounces and/or resistance "rejections" which are awesome shorts.
By the way I'm 20, so anyone can learn to take HUNDREDS of YM points out of the market! and it's easier than you think it is. You won't hit the big trades every time...in fact, I've been stopped out at break even a bunch of times...40pts isn't even worth taking, you need to find ways to catch 100-200 point swings.
You are closing out FAR too early. We've dropped THOUSANDS of points in the DOW and so you must find those areas of fear and panic and sell into the weakness.
If you are confident in your method, you let those good trades run. 40 pts is an easy scalp...anything less than 40 is simply failure. When the losses come knocking on your door, you'll be paying up! (trust me)

if you are trading these futures, learn how to stomach the pains of learning.
Futures is a game for deep pocketed and experienced players. Your little 20 pt stop is lunch money, and your 40 pt gain is what my watch is worth!
I'm not a big player, but I've learned how to swim with these sharks..and live! So I can't tell you everything, except you need a MUCH bigger profit target, when the situation is appropriate.
(for example 14:07 breakout 10/10/08, you took profit early, while most rode the beast to the top!)
...and 9:22 AM SHORT
...and 12:28 PM SHORT
very nice and easy trades. big points.
the biggest mistake of the new trader is taking profit too early! you WILL go broke taking a small profit! The saying that "you never go broke taking small profit" is BUNK and BOGUS. You need good sized winners to pay that "tuition" now or later...and a few hundred points in YM is like, nothing much anyways
so. look at a 200 sma. draw supports and resistance, use observations. then act accordingly.
if you haven't heard of market internals go search (advance and decline issues, go learn about those as well as $uvol and $dvol).