When developing a trading system a trader should focus on market behavior and market movement in particular. For this purpose we need to understand inner organization and life cycle of trend. Trader’s behavior and, as a result, price movement should be taken into consideration. Based on this, we can make a conclusion that markets consist of three trends. The first trend, the most continuous one, can last for several months and should be used to determine market direction for opening positions. The second trend is correction lasting for several days and determined by more sensitive indicators. The third market movement looks like a sideways trend between correction and main trend extension. This is the shortest trend continuing for one or two days.