Market action can go upward, downward or congestion. Following a big move either upward or downward can be known as trend following. You can notice a trend coming with the help of indicators such as moving averages, breaks of channels and support/resistance levels and etc. Trend following also requires risk management. When using this, you must be careful with the trade sizes and you must decide firmly when and what price you want to exit your position. Secure stop losses carefully.