Using Indicator Buffers to Connect Chart Trade Controls with an EA

Summary

This installment of a market replay and simulator series turns a Chart Trade interface into a functional indicator that can communicate with an Expert Advisor. The indicator declares a data buffer, initializes it, and updates it during calculations and chart events. A class handles the interface, mouse events, and buffer contents, allowing an EA to read user actions such as order-related button clicks as indicator data.

The article outlines the indicator setup and explains the buffer and event flow, including why clicks on chart objects must be distinguished from unrelated mouse events. It presents this as an implementation step in a larger replay-system project and assumes familiarity with earlier installments covering the underlying architecture. The material concerns trading-tool integration rather than a trading signal or tested strategy; it does not provide performance evidence.

Key ideas

• A custom chart-trading interface can expose its state to an EA through an indicator data buffer.
• The indicator refreshes the buffer during both calculation and chart-event handling.
• A supporting class manages interface objects, mouse events, and data exchanged with the EA.
• Chart clicks may originate from unrelated chart objects, so event handling must identify relevant interactions.
• The implementation depends on concepts developed in earlier parts of the replay-system series.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.