K-BB Breakout

Require that price is not overextended from emaFast: |close - emaFast| / atrVal < 2.0 at entry. BB breakouts that occur when price is already 2+ ATRs away from the 50 EMA are often late entries near exhaustion, leading to poor risk-reward. Filtering these out keeps only well-positioned breakouts with room to run, improving average trade PnL and sharpe.