Fixed 256-Element Ring Buffers for Trading Indicators

Summary

This document explains a simplified ring buffer intended for short time series, indicator buffers, and intermediate streaming data inside trading software. It uses an unsigned 8-bit index that cycles through values from 0 to 255, so the implementation can omit boundary checks associated with a variable-sized buffer. The fixed capacity is 256 elements, and the indexing follows time-series order, which is opposite to ordinary array indexing.

The described interface initializes all locations to a chosen value, adds a new element, updates or retrieves an element by index, accesses or overwrites the latest element, and reports the buffer size. Compared with a general ring buffer, it has no resizing operation. The document argues that this simplification can improve speed and be suitable for small buffers, but it provides no benchmark or measured performance evidence. Its capacity and indexing convention are fixed constraints, so it is not a general replacement for dynamically sized storage.

Key ideas

• An 8-bit index cycles through a fixed buffer of 256 elements.
• The fixed index range allows the implementation to avoid checks for an index passing the buffer boundary.
• The buffer supports initialization, insertion, indexed update and retrieval, and access to the newest value.
• Its time-series indexing order is reversed from ordinary array order.
• Fixed capacity may suit short indicator or stream buffers, but the document gives no benchmark results.

Tags

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