This snippet counts how many tick updates have occurred for the current bar by incrementing a per-bar counter on each last-bar update. It helps you measure intra-bar activity (“how many ticks built this bar”) on both tick charts and classic time-based charts.

if not isset($ticks[barindex]) then
$ticks[barindex] = 0
endif

if islastbarupdate then
$ticks[barindex]=$ticks[barindex]+1
endif

return $ticks[barindex] coloured(0,255,255) style(histogram)

Code Logic

• $ticks[barindex]: Persistent per-bar storage (an array indexed by barindex) that holds the tick-update count for each bar.
• barindex: The current bar’s index; used to ensure the counter is tracked separately for each bar.
• isset(): Checks whether $ticks[barindex] already exists; if not, the code initializes it to 0 to avoid undefined access.
• islastbarupdate: True only during updates of the most recent (still-forming) bar; ensures the counter increments only when the live bar receives a new update.
• $ticks[barindex] = $ticks[barindex] + 1: Increments the counter by one for each last-bar update, effectively counting tick updates that build the current bar.
• return … coloured(0,255,255) style(histogram): Plots the per-bar count as a cyan histogram, making tick activity visually comparable across bars.