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The SPY volatility gauge

Opening implied volatility against the previous close and the weekly level, so you know before your first trade whether the day is likely to move.

The SPY volatility gauge card

Screenshot from the Dojo demo, with demo data.

What it shows

The at-the-money implied volatility of SPY at the open and near the close, the previous day's readings, the weekly level and a 20 day trend line, calculated from option prices on your own data key.

How to read it

When the open prints well above the previous close, the card flags that volatility is building: expect a wider range and faster moves, and consider smaller size and a strict cutoff. A calm open reads as calm.

A context tool

The gauge does not tell you what to trade. It tells you what kind of day you are walking into so your plan fits it.

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