Forecasting tools may have value when you are trying to predict the weather (and even there they are more often than not quite bad depending on the time horizon of course), but in markets forecasting tools are problematic as they never catch the critical outliers that can destroy your investment totally. The reason it sometimes works is because everyone uses the same tools and they function like a sort of shelling point then. That sets free a herd movement towards that new price point. The question then becomes who chooses the smartest spot to sell before everyone else takes the opportunity.