K-Trend Pullback

Increase rsiThreshold from 55 to 70. The current threshold of 55 is too permissive, potentially allowing entries in weak or overextended momentum conditions that quickly reverse. A higher threshold (70) ensures stronger bullish momentum confirmation before entry, filtering out lower-quality pullback signals. Given the 14.3% win rate, the entry criteria are clearly not selective enough; this change targets Sharpe by improving signal quality and win rate.