This optimization improves the execution efficiency of the `SMC_TrendBreakout_MTF` indicator by:
- Replacing the manual buffer clearing loop in `OnCalculate()` with the native `ArrayFill()` function.
- Replacing the `CopyTime()` call in `GetMTFDir()` with the lighter `iTime()` function for MTF bar timestamp checks.
- Refactoring input-based logic (Donchian lookback and signal bar index) into global cached variables initialized in `OnInit()`, avoiding redundant calculations on every new bar.
These changes reduce CPU overhead and improve the indicator's responsiveness, especially when attached to multiple charts or using lower timeframe confirmations.
Co-authored-by: Mouy-leng <199350297+Mouy-leng@users.noreply.github.com>
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