# T403

> indicator inputs come from different timeframes

**Severity** Error

An indicator with several series inputs (for example `ta.correlation`, `ta.crossover`) receives series from subscriptions with different timeframes. Their bars do not line up one to one, so the result would compare unrelated periods.

Feed the indicator from subscriptions that share one timeframe, or compute each side on its own timeframe and compare plain values afterwards.

## Failing example

```flowscope
script "Price vs OI correlation"
data (
  chart = subscribe(data.ohlcv)
  oiDaily = subscribe(data.oi, timeframe: 1D)
)
pane p = pane(title: "Correlation", height: 0.2)
plot corr = plot.line(title: "Close/OI correlation", on: p)
on chart.close {
  corr.plot(ta.correlation(chart.close, oiDaily.close, 30))
}
```

## Fixed example

```flowscope
script "Price vs OI correlation"
data (
  chart = subscribe(data.ohlcv)
  oi = subscribe(data.oi)
)
pane p = pane(title: "Correlation", height: 0.2)
plot corr = plot.line(title: "Close/OI correlation", on: p)
on chart.close {
  corr.plot(ta.correlation(chart.close, oi.close, 30))
}
```

## Related

- [T408](/docs/scripting/reference/diagnostics/t408)