Stacking oscillator lookbacks into a heatmap mosaic

One lookback is only one slice

A conventional single-length plot, such as a relative strength index line crossing a fixed threshold, shows one period in detail. It does not show how that reading behaves across a range of lookbacks. The relative strength index is treated here as a bounded oscillator whose conventional single-length plot is one slice of a multi-period heatmap.

When only one length can be plotted, a single middle-ground lookback is the usual compromise. A conventional default such as a 14-bar relative strength index lookback is treated as an open construction choice rather than a unique correct length.

Editorial interpretation: that compromise is single-period myopia. Choosing one middle-ground lookback to avoid noise hides the rest of the period range.

How the heatmap mosaic is stacked

A multi-lookback heatmap is built by computing the same technical indicator at many lookback lengths and stacking those readings as horizontal slices. The vertical axis runs from shorter periods at the bottom to longer periods at the top.

Each vertical position is a different lookback period. The same multi-lookback heatmap construction is specified for the relative strength index, the stochastic oscillator, and the commodity channel index, so each listed model is rendered as a family of period slices rather than as one default length. The commodity channel index is included as a classic oscillator in that same family.

Color encoding instead of a printed number

Numeric oscillator values are replaced by a color scale so that each slice can be scanned as bullish, bearish, hot, or cold rather than as a single printed number. That mapping is the color encoding of the heatmap mosaic.

The stochastic oscillator is constructed as a momentum measure of where the latest close sits between the highest and lowest closes over the chosen lookback. In the heatmap version it is colored green for an expected bullish state, red for an expected bearish state, and yellow when the state is indeterminate.

Short-period lead and long-period confirmation

Shorter-period slices are intended to flag a change earlier, while longer-period slices are intended to show whether the same condition persists.

The earlier color change at the bottom is the short-period lead, used as the first sign that conditions may be shifting. The slower color change at the top is long-period confirmation, used to judge whether a move is persisting rather than a brief spike.

Why the periods stay fixed

Dynamically changing the lookback to fit measured conditions is presented as an alternative that can add noise or lag. That is the adaptive-lookback tradeoff.

The construction keeps many fixed periods visible at once instead of collapsing them into one adaptive length.

A historical futures illustration

On a 15-minute stock-index futures example dated 23 to 25 October 2011, shorter-period heatmap slices changed color before the longer-period slices. Volume color was used alongside the oscillator heatmap to describe an early, then fading, then reversing swing.

Editorial interpretation: the dated example is a historical picture of short-period lead appearing first, then longer slices catching up or fading. It is not evidence of present-day performance.