Certainly that this only works sometimes because every time new conditions are creating in the markets and the markets is really growing so is the economy of the world is growing and markets is too getting bigger and bigger so i don't think history will make that much impact for predicting the future of the markets ! There are two kinds of market analyzing method, technical analysis and fundamental analysis. Technical analysis helps us to predict the future price movement depending on the previous data. Most of the time it is helpful and a trader can easily have a good concept on the market trend with this.