I highly disagree with people who just say 'all you need is risk management'. If it's true that all you need is risk management, just take trades with 20pip SL 30pip TP and just randomly take these trades. You will lose money because you don't have an edge. Trading is all about having an edge and increasing the probabilities towards your own favor. Of course without risk management you can't do anything, but just with risk management alone you are still nothing. You need an edge.