Delta bar
What it shows
Section titled “What it shows”Time gained or lost against the best or optimal lap.
http://127.0.0.1:8745/w/delta?lang=enMaximum subscription: 60 Hz.
URL options
Section titled “URL options”ref=best|optimal|session|sessionOptimal (best). range=1 sets seconds per half-bar; must be positive. decimals=2 uses two decimal places, otherwise three.
With ref=alltime the delta is against your best lap ever in that car and track, saved on your PC (or today’s when faster). It saves itself when you drive a faster valid lap live.
Calculations and limits
Section titled “Calculations and limits”Reads the four native sim references without rebuilding laps. Negative gains time; positive loses time. Trend is in s/s. bar = clamp(delta / range, −1, 1): the bar saturates, the number does not. Without the reference validity signal, it hides without automatically choosing another reference.
Privacy
Section titled “Privacy”Uses player or session data without publishing personal identity. Processing is local. If you capture the overlay with OBS, its visible values become part of the broadcast.