# Trigger a flow from other flow (instead of polling)
**URL:** https://discourse.nodered.org/t/trigger-a-flow-from-other-flow-instead-of-polling/95177
**Category:** General
**Created:** [6 February 2025 10:45 UTC](https://discourse.nodered.org/t/trigger-a-flow-from-other-flow-instead-of-polling/95177 "2025-02-06T10:45:43Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@node\_red2025](https://discourse.nodered.org/u/node_red2025)
#### Post date: [6 February 2025 10:45 UTC](https://discourse.nodered.org/t/trigger-a-flow-from-other-flow-instead-of-polling/95177/1 "2025-02-06T10:45:43Z")
In Flow 1 I have a function which calculates stuff and then returns a msg with some content.
```auto
msg.payload = 2;
msg.text = "State 10 reached";
return msg;
```
In the second flow I have a periodic trigger which checks the state of a variable every minute.
Now I want to trigger this second flow from the function body from flow 1. I tried of course to educate myself but got stuck.
Reason that I want it to trigger instead of polling is that flow 2 should start immediately after in flow 1 that condition is reached.
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### Author:  [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)
#### Post date: [6 February 2025 11:01 UTC](https://discourse.nodered.org/t/trigger-a-flow-from-other-flow-instead-of-polling/95177/2 "2025-02-06T11:01:21Z")
Hi, welcome to the forum.
Cant you just use a `link-out` (attached to the function that calculates) connected to a `link-in` node attached to the 2nd flow where you want to trigger something?
you can always add a `filter` node that checks the value has actually changed.
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### Author:  [@node\_red2025](https://discourse.nodered.org/u/node_red2025)
#### Post date: [6 February 2025 11:19 UTC](https://discourse.nodered.org/t/trigger-a-flow-from-other-flow-instead-of-polling/95177/3 "2025-02-06T11:19:42Z")
Perfect, exactly what was looking for! Thanks!
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [20 February 2025 11:20 UTC](https://discourse.nodered.org/t/trigger-a-flow-from-other-flow-instead-of-polling/95177/4 "2025-02-20T11:20:21Z")
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