Inputs:

- Brick Size — Renko brick size in price units.

- BB Period — Bollinger lookback in completed Renko bricks.

- BB Deviation — standard-deviation multiplier.

Visual design:

- cyan up bricks and red down bricks;

- blue outer Bollinger bands;

- gold middle band;

- square Renko bricks with automatic scaling;

- one Canvas bitmap layer instead of hundreds of rectangle objects;

- automatic redraw when the chart is resized.

The indicator does not require DLLs, custom symbols, offline charts or external indicators.

This is an educational CodeBase example intended to demonstrate custom Renko rendering with a causal Bollinger overlay. It does not provide trading signals or make claims about future performance.