True Strength Index (TSI, 25/13)Momentum

Timeframe M1 · unit pts

What it measures

The TSI double-smooths the bar-to-bar price change with two consecutive EMAs (periods 25 and 13) and divides by the double-smoothed absolute change. The result is bounded roughly within [−100, +100] with 0 as the neutral midpoint.

How Janira reads it (bullish vs bearish)

A positive TSI means the double-smoothed momentum (direction × speed) is upward. A negative TSI means it is downward. Because it uses double smoothing, the TSI is less noisy than single-period momentum measures but still captures genuine trend direction. Crossovers of the zero line are meaningful.

In plain language

TSI takes the question 'is the market going up or down?' and applies two layers of smoothing to reduce noise. The answer is a number between −100 and +100 - positive means yes, the smoothed momentum is upward; negative means it's downward.

Scenarios

• TSI crossing zero from below: the double-smoothed momentum has just turned from downward to upward - a delayed but filtered confirmation that buying pressure has become dominant.
• TSI above +25 and rising: sustained and accelerating upward momentum, well above the neutral zone, confirmed by two smoothing layers.
• TSI below −25 and falling: deep, confirmed downward momentum - sustained selling pressure across both EMA windows.
• TSI diverging from price (price new high, TSI lower high): the velocity of the upward move, even after double smoothing, is decelerating relative to the previous peak.

More momentum indicators

Janira computes True Strength Index (TSI, 25/13) deterministically from live price action, the same way for every reading - no discretion, no hidden weighting. This page explains the method; it is not a live reading and not advice.