Traders Dynamic Index

What is the Traders Dynamic Index?

The Traders Dynamic Index (TDI) is a composite momentum indicator, developed by Dean Malone, that layers several readings into one pane. Its base is an RSI, commonly 13-period. On top of that it plots a fast moving average of the RSI (the price line, often 2 periods), a slower one (the signal line, often 7), and Bollinger Bands calculated on the RSI itself: volatility bands around a market base line, commonly on a 34-period basis.

The design intent is a single window that answers three questions at once: the RSI supplies momentum direction, the two moving averages supply crossover timing, and the bands supply a volatility envelope for the momentum reading. It became popular in forex trading as an all-in-one panel, though every component is a smoothed derivative of the same RSI series, so its lines confirm one another more than they independently verify anything.

How traders use it

• As a crossover trigger: the fast price line crossing the slower signal line is the classic TDI entry cue, usually filtered by whether both sit above or below the 50 midline.
• As a volatility read: the price line pressing an outer band marks stretched momentum, while pinching bands signal contraction that often precedes a stronger directional move (not a guaranteed one).
• As a regime filter: the market base line's position and slope relative to 50 is used to permit longs, shorts, or neither, functioning like a bias check before any crossover is taken.