Building a Stateful Trendline Manager in MetaTrader 5
Summary
This article presents an engineering framework that turns manually drawn MetaTrader 5 trendlines into managed objects with identity, interaction history, and lifecycle state. A manager discovers and registers chart lines, while separate components handle geometry, chart events, market evaluation, and visual updates. User changes are synchronized through chart events; price behavior is assessed as new completed candles arrive.
The lifecycle distinguishes active lines, pending touches, confirmed bounces, breakouts, retests, and expired lines. Configurable proximity and ATR-based thresholds, along with consecutive candle-close requirements, govern when interactions qualify as state changes. The article explains the architecture and implementation foundation, but does not present a predictive strategy, trading results, or evidence that these rules generate profitable signals. Its contribution is a reusable software design for tracking trendline behavior, and its thresholds would need evaluation for any specific market or use case.
Key ideas
- A manager can add identity and lifecycle state to ordinary chart trendlines.
- Chart edits and price-driven events are handled through separate pathways.
- Completed candle data helps avoid state changes caused by temporary intrabar moves.
- Proximity, ATR thresholds, and confirmation closes control touch, bounce, and breakout classification.
- The framework supports analysis and state tracking rather than claiming predictive trading performance.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.