Currency Strength Heatmap

The Heatmap measures how far each currency has moved against all the others over the selected window and turns it into a single strength score. The scale runs from -1 to +1 and is absolute: each currency's move against the field is measured in units of that market's normal movement over the window, so +1 means an ATR-sized move against the field over the window (roughly one and a half standard deviations of daily returns, well above a median day) and a quiet market genuinely reads near zero. It is not rescaled to whichever currency happened to move most. Momentum shows whether that strength is building or fading — the change between the latest window and the one before — and it moves with strength most of the time; what matters is where the two disagree. Recalculated several times a day from real price data, so you can see at a glance which currencies to buy against which.