Statistics based on risk-reward ratio

I need to track the risk-reward ratio.

For example, if my order is a buy at 3, with a stop loss at 2 and a take profit at 5, the ratio is 1:2. If I sell at 4, the trade would be tracked as 1R, hitting the take profit would be 2R, the stop loss would be -1R, and selling at 2.5 would be -0.5R.