The Linear Regression Channel is a technical analysis tool that consists of three parallel lines plotted on a price chart. It is a statistically-based indicator that uses the **linear regression** (or "least squares fit") method to determine the primary trend direction.
- The **Middle Line** is the actual linear regression trendline.
**Important Note on "Repainting":** The Linear Regression Channel is a "repainting" indicator by nature. Because the entire line is recalculated for the most recent `N` bars every time a new bar forms, its position in the recent past can change.
Our MQL5 implementation is designed to be highly efficient and visually clean by leveraging MetaTrader 5's built-in **`OBJ_REGRESSION`** graphical object.
- **Object-Based Plotting:** The indicator uses a single, built-in `OBJ_REGRESSION` object. This object is managed by the MetaTrader terminal, which handles the complex regression and maximum deviation calculations internally using highly optimized code.
- **Clean, Non-Continuous Display:** By default, the indicator only displays the single, most current regression channel calculated on the last `N` bars.
- **Efficient "On New Bar" Updates:** The indicator is extremely light on terminal resources. The channel object is only updated **once per bar** when a new candle forms, preventing unnecessary recalculations on every tick.
- **Automatic Cleanup (RAII):** The graphical object is given a unique name and is always deleted from the chart when the indicator is removed.
- **Caution:** Due to its repainting nature, the indicator is best used for confirming the current market structure rather than for generating precise entry signals from past data.
