Candle crossing above BB

Algos, strategies, code
1

Hello Sir

I need code for the situation when the candle is crossing above or below Bollinger band, not at closing but when breaks the top or bottom of BB.

Regards
Fellow trader

2

Sir pls gibe code. .its been 3 days

3

For the above given condition

when Bollinger band top cross last traded price

LAST > BBT(CLOSE, 20, 2, EXPONENTIAL)

when Bollinger band bottom cross last traded price

LAST < BBB(CLOSE, 20, 2, EXPONENTIAL)