Taking a recent swing low and swing high, the risk reward tool can measure potential profit to risk when stopped out and give the reward to risk ratio. Moving the mouse over the shaded area, here we see we can potentially make 375% while risking only 32.14% or in other words the ratio is 11.67, which is excellent. Any time one can use this tool to find a trade that has a ratio of 3 or more, that is great. It makes the odds so that effectively one could take every trade and have it be a coin toss winning half the time for 3x the bet and losing half the time for all the bet, and not care about it because the trades would breakeven with no loss all together. So even the slightest edge where it be due dilligence or trading system or indicator to make those trades even slightly better than a coin toss, then a profit is made.
During backtesting trading techniques, if something is found that works 60-70% of the time that's great. Use it with trade setups that are reward to risk ratio over 3. That is a profitable way to make money trading. Whatever trading system is used it doesn't have to be super-perfect, complex, fancy, or better than anyone else, just "good enough" is fine.