Spread as a volatility gauge you already have for free

[Amanhasnoname]

The spread is a real-time risk meter that most traders glance at only when it gets silly.

Liquidity providers widen quotes when they're uncertain or when they expect fast moves. A spread creeping up from its normal level often precedes a burst of volatility by seconds. Spread compression, going back toward the minimum, usually signals calm and plentiful liquidity.

Plotting the spread over time, along with price, shows these cycles clearly. A baseline for each pair and each time of day makes deviations easy to spot.

As a filter, it's simple. Stay out when the spread is more than, say, 1.5 times its typical value for that time. As an alert, it can warn about incoming news or rollover before the clock does.

It doesn't tell direction. A wide spread just says the environment is riskier and more expensive.

Combine it with other information and it adds a layer that most chart-based indicators lack, because it measures the cost and the risk in one number.

Do you use spread as a filter, and what threshold have you settled on?