I disagree that "DISCIPLINE" is the answer to making money. Discipline is about "NOT" losing money.
Discipline is not part of the plan to make money, it is what is used to CONTROL yourself from YOU. You are and always will be your own worst enemy. Sure you use discipline to exit trades when you were flat wrong, thats a given.
How can discipline increase your odds in a game of chance? A loser is a loser and a winner is a winner. Correct?
Discipline is my world is "AFTER" you are filled, not BEFORE. Some will say discipline as they define it in trading means not to overtrade, size matters, yada, yada, yada but that is incorrect. That stuff is about money management etc. Risk management and money management are not the same.
The days MISSION is to have a battle plan to attack the mkt and gain what you can by implementing your well honed tactics based on the odds those tactics (signals) have shown in prior mkt conditions. Lets just call it an "INTERNALIZED" battle plan of attack.
Discipline is NOT a plan of attack, discipline is a plan of exiting the battlefield, you use discipline to exit when your tactics have pinged the gray matter between the ears that you have reached the profit potential of that individual skirmish. Thats also the same discipline you use to exit a losing battle.
I would never go into a battle on a hope and a prayer (there are no trading gods and god does not bless trades). Entering a battle with just an exit plan is admitting you are NOT ready to do battle in the real world. Discipline is NOT the winning strategy you seek.
PS: more wins over losses only counts in coin flipping, NOT in a game of probability with overhead costs.