Your SL must always depend on your goals and must always depend on your strategy. If your trading scalp, then your TP must be between 10 and 30 points? So it means that your SL must also be within 50 points. The trick here is your entry. When you are close to the support level or resistance level, you can open a position, and when you can get SL or TP, your close or near the hub price will depend on the market volatility. But if you open the position near the resistance or support level, then they have a great chance of being TP more than TP.