This useful screener will catch a bounce on the lower Bollinger band in an uptrend.
indicator1 = Average[200](close)
c1 = (close > indicator1)
//SMA 200 en hausse
indicator2 = Average[200](close)
indicator3 = Average[200](close)
c2 = (indicator2 > indicator3[1])
//+ bas d'hier > Boll inf
indicator4 = BollingerDown[20](close)
c3 = (low[1] >= indicator4[1])
//+ bas du jour < Boll inf
indicator5 = BollingerDown[20](close)
c4 = (low < indicator5)
//Close du jour > close hier
c5 = (close > close[1])
c6 = (close >= 0.3)
SCREENER[c1 AND c2 AND c3 AND c4 AND c5 AND c6] ((close/DClose(1)-1)*100 AS "% Veille")