How to use super trend (technical analysis) ? Super trend is a very simple indicator for find out the trend. The Buy and Sell signal changes as soon as the indicator flips over the closing price. When the Super trend closes below the Price, a Buy signal is generated, and when the Super trend closes above the Price, a Sell signal is generated. In Investor this is shown with green and red arrows, so that all you have to do is use the green arrow for Buy and red arrow for Sell.