It takes smart choices to make smart money. Position sizing is the part of risk management that turns a good setup into a survivable strategy: define the capital you can lose before you enter, and let the math—not emotion—choose your share count.
The total amount of capital you have in your portfolio.
The percentage of your total capital you are willing to risk on a single trade.
The price that you plan to enter at.
The price that you plan to exit at with a loss IF you are wrong.