Hover callback payload — invoked by CrosshairController on every snap-to-candle change. Useful for status bars and legends.
Raw price under the cursor (before candle snap).
Topmost interactive object under the cursor, or null.
0 = main price pane; 1..N = indicator sub-panes (top→bottom).
ISO-ish time string formatted by the current resolution.
Hover callback payload — invoked by CrosshairController on every snap-to-candle change. Useful for status bars and legends.