The best harami strategies wait for confirmation, combine the pattern with indicators, and trade at structural levels. Enter long on the break above the high of the second candle for a bullish Harami; enter short on the break below the low of the second candle for a bearish Harami. Place the stop just below the low of the bullish Harami setup or just above the high for a bearish Harami.
The signal is stronger when it occurs in regions of major support or resistance, on spike volume, or on divergences in indicators like RSI or MACD.
Bollinger Bands tend to filter false signals and keep traders in winning trades longer.