Whether it's shorting or going long, it's all about the ebb and flow of fortune; it's impossible to profit unilaterally. This is an ironclad rule. Stick to the direction you believe in, and don't invest too heavily all at once. Reserve enough financial flexibility to perform Margin Replenishment or Close Position operations at different stages to balance the cost average. As long as you reserve enough financial flexibility for Margin Replenishment, it's hard to incur losses.