only problem I can see with this system is you are trading against the trend, in an uptrend selling R1, R2 etc. will only give so many pips before uptrend continues. Also you seem to be buying at R1 and target at R2? should you not only ever sell at R and buy at S ?
Nothing wrong with trading counter trend you are just looking at logical areas of support or resistance. You can buy at R1 once its broken as resistance acting as support. If you've seen a decent pop upwards to R2 and then get a pull back to R1 its a logical place to buy a dip in an up trend.
You don't have to trade against the trend if you don't want to, On a bullish move you could look for pins on a dip as a decent place to buy in an up trend or to sell on a rally in a down trend. Its just a reversal pattern at a logical place of interest.