All I can say is that 8/10 are losers is highly improbable. Given no other information, if you enter a trade there is a 50/50 chance that the next tick is going to be up or down. But notice I said given no other information, there is much more information from the behavior of the charts. If you are a small player the charts will help you be right more than 50% of the time. The rest is how your algorithms and trading methodology take advantage of the information.