The risk-reward ratio (also called risk/reward) is the comparison between how much you risk losing and how much you can win.
Risk-Reward Ratio = Max Profit / Max Loss
If a spread has:
For every $1 you risk, you can win $2.33.
Professional traders won't take a trade unless the risk-reward ratio is at least 1:1 (or better).
If your max loss is $300 and max profit is $200, that's a 0.67:1 ratio. Skip it.
Over many trades, you want wins to be bigger than losses. A 1:2 ratio (lose $1, win $2) is powerful.
Even if you're only right 40% of the time, a 1:2 ratio is profitable:
Review every trade:
If not, skip the trade. There's always another one.
Related: Stop Loss, Profit Target, Max Loss, Max Profit