Persistence

Flow · State

True at bar i only if the input signal has been true for ALL of the last N bars. Filters out flickering signals — 'RSI > 70 for 3 consecutive bars' instead of any single bar's spike.

Persistence filters out flickering signals by demanding a condition hold for several bars in a row before it counts. Instead of "RSI is above 70 this bar" — which a single spike satisfies — it asks "RSI has been above 70 for the last 3 bars." That simple requirement strips out a huge amount of noise, turning twitchy, one-bar conditions into confirmed, sustained states worth acting on.

How it works

The block outputs true at a bar only if the input signal was true for all of the last Bars bars (default 3). A single false bar anywhere in the window resets the count — the streak has to be unbroken. So with Bars = 3, the output first turns true on the third consecutive true bar and stays true while the run continues. It's a confirmation filter: it trades immediacy for reliability.

When to use it

Use Persistence to confirm a condition is real, not a blip. It's ideal on noisy oscillator thresholds ("RSI > 70 for 3 bars" instead of a momentary poke), on regime flags you don't want flickering on and off, and anywhere a one-bar spike would otherwise trigger a trade you'd regret. The cost is lag — requiring N confirmations means you act N bars later — so size the window to balance noise reduction against responsiveness. It pairs naturally with an Edge Trigger downstream if you then want just the first confirmed bar.

Example

Confirmed overbought: feed an RSI > 70 condition (built with Greater Than) into Persistence with 3 bars, so the result is true only after RSI holds above 70 for three straight bars — filtering out single-bar spikes. Use it as a sustained-momentum condition and backtest in the Tester.

Tips & gotchas

• Demands an unbroken streak — one false bar resets the count.
• Trades immediacy for reliability — you confirm later but with fewer false signals.
• Tune the window — longer is cleaner but laggier; 2–3 bars often removes most of the flicker.
• Different from Hold — Persistence requires N consecutive trues to output true; Hold keeps a signal true for N bars after one fire.

Related blocks

• Hold
• Edge Trigger
• Cooldown
• Greater Than

Inputs

Socket	Type	What to wire in
In	signal	Signal to require sustained truth on.

Outputs

Output	Type	Plots as	Description
Sustained	signal	Signal arrows	True iff input was true for the last N bars.

Parameters

Parameter	Type	Default	What it does
Bars	number · 1–500	3	How many consecutive trues are required.

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