Quote from franklin:
Traders with marginal trading strategies always conclude that trading is all about psychology, since that is the only way they can get their marginal strategies to be profitable (i.e., they have too little room for error or undisciplined behavior).
I'm not quite sure if you know what you're talking about. I tell you why:
I have been developing and programming mechanical trading systems longer than I have been trading - Some of them very complex and very refined in many ways, so I know what I'm talking about. Profitable? Yes, but only with the right kind of person who can execute it flawlessly and without hesitation. Most don't have the "mind" for it. This applies for many, even fully mechanical systems, where one person makes a fortune, the other loses a fortune, on the identical system. Why? I leave the answer to you.
As for discretionary trading (scalping is too complex/refined to be systemized) I have refined most of my trading strategies to the very tick, with arduous per-hand-backtesting, simulation, quantitative analysis and spreadsheets. Every day, even after scalping, I enter all my trades into complicated spreadsheets to analyze all the ratios and tweak them. Ask trade4succes. He's seen one of them.
So, don't assume I'm using psychology as an excuse for insufficiently developed, "marginal" trading strategies. The very opposite is the case. I put boat-loads of work even into my scalping, every day. But the bottom line is psychology.
You probably don't understand this, because you maybe trade some system that trades 3-5 trades per day, on 1-2 contracts, with a R:R ratio of 4:1. Admitted, that doesn't take too much psychological prowess... That isn't professional trading, though.
Now, try trading like a professional. "Professional" in the sense we're discussing here means high-volume, high turnover, high margin, high RT. If you're trading ES, margin your account at $2-5K per contract, so you can trade 10-30 contracts. Adapt your stops, R:R ratio etc. accordingly, I.e. smaller targets, and larger stops (likely larger than the targets). Watch and trade.
Now, do that for a week, then come back here and tell us again the story about "marginal strategies" and psychology. Good Luck.
Scientist.