Using Price Velocity and Acceleration to Identify Trend Exhaustion

Summary

The document proposes describing price movement with discrete first and second derivatives: velocity represents the rate of price change, while acceleration represents changes in that rate. It uses a car slowing before reversing as an analogy for a market trend that is losing force. The suggested warning is negative acceleration while velocity remains positive, which the author interprets as possible trend exhaustion. It also recommends using acceleration as a filter before taking breakout trades.

The text argues that moving-average indicators such as MACD and RSI lag because they use historical data, and claims derivatives can react without that smoothing delay. It supplies formulas and a conceptual trading rule, but no implementation details, data, backtests, or comparative evidence for its claims. Discrete derivatives can also be sensitive to noise, and the document does not explain how to choose sampling intervals, filter signals, or manage false reversals. Its description should therefore be treated as a proposed indicator concept rather than a demonstrated institutional method.

Key ideas

• Price velocity is the first derivative of price over time, and acceleration is the derivative of velocity.
• The proposed exhaustion warning occurs when acceleration turns negative while velocity remains positive.
• The document recommends checking acceleration before entering a breakout trade.
• It claims derivative measures avoid moving-average lag but gives no empirical comparison or noise controls.

Tags

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