Easiest location is go to Preferences, select Chart Only Layout. If your particular chart isn't showing, click on the + tab and there's a search box for whatever instrument needed. When you have a position open, the entry price appears as a horizontal red broken line and there will be a small greyed out SL and TP tab either side of it opn the left. Select and drag the Stop Loss or Take Profit level to wherever you wish and when you let go, the order is placed at that price. The charts default to h1 I think so make sure you're on your own preferred timescale.
You can also set these orders from Chart Trading Layout or Default Layout by right clicking on the postion details, select Modify Position, select Modify (Pending?) Order and enter the price into the appropriate dialogue box.
