Building a Movable Trading Chart Panel with MQL5 Events
Summary
This tutorial shows how to create a basic movable chart panel in MQL5 using a rectangle label and chart events. It introduces the OnChartEvent handler and explains how keyboard, mouse-movement, and click events pass information through event parameters. The example enables mouse-movement events, checks whether the cursor is over the panel, and tracks the left mouse button to determine when a drag begins and ends. While dragging, it updates the panel’s horizontal and vertical distances according to the mouse displacement and temporarily disables chart scrolling.
The example is a foundation for interactive trading dashboards rather than a trading strategy or signal. It focuses on a single blank panel and points toward later extensions with multiple interfaces and customized elements. The article’s value is in explaining event handling and coordinate updates; it does not evaluate the trading effectiveness of any interface or provide evidence that a movable panel improves strategy performance.
Key ideas
- MQL5 chart events let an expert advisor respond to mouse and keyboard activity.
- Mouse-movement events must be enabled before their coordinates and button-state data can be used.
- A panel can follow a drag by recording its starting position and applying subsequent mouse displacement.
- Chart scrolling can be disabled during a drag and restored when the left mouse button is released.
- The example teaches interface construction and does not test a trading method.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.