The story that any broker or advisor will tell you is about the percentage of trading or investment calls that they go right. Many brokers and traders talk about their success percent. Does it really matter to you? This is an absolute myth and can mislead you. It hardly matters if your calls were right on 80% of the occasions but your strategy did not treat the winners and losers differently. Secondly, success percent is based on the assumption that all your calls are acted upon. Here you are assuming that every call given was acted on which is mostly not the case. That is impractical. At the end of the day, the performance of the portfolio is what matters!