If the price is above a MA, it can act as a strong support level, i.e., if the price does fall, the price might have a more difficult time declining below the MA price level. Conversely, if the price is below a MA, it can serve as a strong resistance level, i.e., if the price were to increase, it would still struggle to rise above the MA. Therefore, if the price falls below a support level, that can indicate a short-term sell signal. Alternatively, it would be regarded as a short-term buy signal if it rises above a resistance level.