Event-Driven Supply and Demand Zone Management with Persistent Logs

Summary

This article describes an architecture for managing supply and demand zones represented by chart rectangles. Each zone has a lifecycle and can be created, modified, invalidated, retained in a ghosted state, or reactivated. The earlier design relied on repeatedly scanning chart objects during market ticks, which could detect user changes but performed checks even when no chart interaction occurred. The proposed revision assigns market-driven work to the tick handler and user-driven changes to chart event callbacks, with dedicated handlers for registration, coordinate updates, and removal.

A persistent event subsystem records lifecycle changes in an append-only structured history, addressing the loss of operational records when a terminal session ends or a chart refreshes. The article frames event callbacks as a better fit for sporadic user actions while keeping price-dependent processing in the market pathway. Its evidence is architectural description and code examples rather than measured performance or trading results. The framework concerns chart-state management; the supplied text does not establish that its zones produce profitable signals or quantify the efficiency gains.

Key ideas

• Chart object creation, modification, and deletion can be handled as separate events instead of detected by repeated scans.
• Market-driven updates and user-driven chart actions belong in distinct execution pathways.
• Dedicated handlers help keep chart objects and their internal zone representations synchronized.
• Persistent lifecycle logs preserve a trace of zone transitions beyond the current terminal session.
• The article presents an engineering architecture and does not report measured trading performance.

Tags

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