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Bars Into Session

Indicators · Levels

Bars Into Session node on the canvas

Bars elapsed since the current session opened (0 on the open bar, then 1, 2, …). NaN outside the session. The timer behind opening-range logic ('trade only in the first 6 bars of the London session').

Bars Into Session counts how many bars have elapsed since the current session opened — 0 on the opening bar, 1 on the next, and so on — and reads NaN outside the session. It's the timer behind opening-range and time-of-session logic: "only trade the first few bars," "avoid the open," "act mid-session."

How it works

From the bars input it finds the current session's first bar (for the selected session) and counts bars from there, resetting to 0 each new session. Outside the chosen session there's no count, so it emits NaN. Session boundaries use the session's own exchange timezone. Lookahead-free.

When to use it

Use it as a within-session clock to shape when a rule can act: gate entries to the first N bars for opening-range plays, skip the first few bars to dodge open volatility, or restrict a rule to a mid-session window. Compare the count to a Constant with LessThan / GreaterThan to build the window.

Example

Bars Into Session on the EURUSD H1 chart

Bars Into Session on EURUSD · H1

Opening-range window: wire bars into Bars Into Session (session = London), require the count < 6 with LessThan, and And it with a breakout trigger so entries only fire in the first six bars of the session. Backtest in the Tester.

Tips & gotchas

  • 0 on the open bar, then increments — mind the off-by-one when thresholding.
  • NaN outside the session — downstream reads that as "no value," so gates naturally go quiet.
  • Pairs with Opening Range and New Session for full session logic.

Inputs

Socket Type What to wire in
Bars bars Price bars.

Outputs

Output Type Plots as Description
bars series Line · sub-pane Bars since the session open (NaN when out of session).

Parameters

Parameter Type Default What it does
Session choice (asia, london, newyork, day) london

Reference auto-generated from the block catalog · category Indicators.