Risk to reward should always be greater than 1:1. if we risk 10 pips as stop loss, then reward should be atleast greater than 10 pips in profit.
if you are risking 100 pips to gain 10 pips there is a fundamental flaw.
Always risk 1 to gain 1.5 or 2. this should be the minimum risk reward ratio.
Best way to profit in is to set up only high reward trades.
always enter a trade from there is a certainty of move in the direction of profit.
Determine areas of support and resistance first. i mean strong supports and resistances.
4Hour candle or bar chart will clearly show those areas. one can even use other time frames.
when prices approach the strong support area one can enter a buy trade..
when prices approach the strong resistance area one can enter a sell trade
placing a stop loss is the most tricky. it can be the recent high or low. just a shade above or below that price.
that way you are in the safe zone with the trade