At first glance, the hcl index has an orbit line formed by the convergence of three lines, which is a multi-air warfare method.

The three lines are named upper line, middle line and lower line respectively. When the price falls below the line, 1 set will be opened. Price to the center line, 1 unit opening, online stop loss. Open more orders and do more in the opposite direction. On the contrary, the advantage is that you can add positions in the right position, ensuring the income and reducing the stop loss.