Why it matters
Volatility changes the reliability of stops, spreads, and strategy assumptions.
Operational use: this is how the market taxes urgency. When it appears, slow down or size down.
Common trap
Thinking volatility is always opportunity. It’s also risk and friction.
Example
A strategy that works in low vol dies when vol triples.
Operational cue: if you can’t point to it on the chart, in the DOM, or in your broker logs, treat it as a story and trade smaller.
Notes
Volatility is not ‘good’ or ‘bad’. It’s a regime that changes everything.
Quick rule
- If you see this repeatedly, you are in a different regime than your model assumes.
- Regime change usually means position size change.
- When in doubt: trade smaller, or don’t trade.