Risk and reward
How often you need to be right.
How often do you need to be right? Risk to reward is the distance to your stop against the distance to your target. It decides how many losses you can afford.
Stop 2%, target 6%: 1 to 3. You risk one unit to make three. Lose three times, win once, and you are even before fees.
At 1 to 3 you break even winning 25%. At 1 to 1 you need better than 50%. Fees and funding push every number a little higher.
1 to 1 at 50% is a slow loser. A coin flip with 0.09% taken off each round trip. The exchange wins that game. You do not.
Put the stop where the idea breaks. Then ask if the target is three times further. If it is not, the trade is not good enough. Skip it.
Do the math.
Break-even check.
Is the trade worth it? SOL long idea at $186, $500 paper position. Stop at $182, target at $190. Buy means take it, skip means pass, sell means short it instead.

