regime change occurs on the average every 3 months and the model gets outdated.
early signs of outdated model includes consistent non-commit signals
initial changes to trading parameters will tend to yield poor initial outcomes.
Good outcomes will require time to play itself out
Buying on the MACD bullish reversal tends to be too late in a volatile market. Potential gains from the reversal would have most likely played out by then
Drastically reducing number of outstanding positions leads to inefficiency of capital deploy as capital is left idling around with a bullish trend plays itself out
Explore buying when negative MACD trend slows down.