טפסי פתיחת חשבון

The reverse is true for buys. The size of the price change required to generate a signal can be either a percentage or a nominal figure arrived at through testing or analysis of past moves. The size also determines how sensitive the system is.

The rate-of-price-change calculations can be used to develop a countertrend system. This is a system that attempts to buy at the low and sell at the high. Traders try to anticipate the next market move and hope to catch all major moves early or just before they begin. When using this type of system, you must use protective stop-loss orders. It’s not like a trend-following system that eventually corrects itself by establishing an offsetting position. With a countertrending system, you are net long or net short until you close out your position. That’s why stops are recommended.