In the Elder Ray Index indicator, Bull Power should remain positive under normal circumstances, and Bear Power should remain negative in normal circumstances. If Bull Power enters into negative territory, this implies that sellers have overcome buyers and control the market and the Bear Power indicator enters into positive territory and this indicator indicates that buyers have overcome sellers and control the market. A trader should not go long at times when the Bear Power indicator is positive and he/she should not go short at times when the Bull Power indicator is negative.