Having more than one user defined price variable from the chart would be useful for automatically calculating risk on trade setups. The only user defined price I have found for the chart is PriceAtMouse.
Currently, I would have to quickly draw on the chart with the line/ risk reward tool, to see how far away my stop would be from my entry price/s, and then use a hotkey to place a stop near to that number. Whereas, if I had more than one price reference, I could have a single hotkey that would be able to dynamically adjust to each set up.
E.g. As it stands, if I draw on the chart and see my stop is 0.57% away for that particular setup, I would use my pre-configured 0.6% stop hotkey.