TOS Standard Deviation All Indicator Explained

TOS Standard Deviation All (from the thinkorswim tradition) fits a linear regression across the window and draws parallel rails at ±1, ±2, ±3 standard deviations of price around that line — the full statistical map of the current trend: its direction, and how far price strays from it.

How It Works

• A least-squares trendline anchors the channel.
• Rails at fixed standard-deviation multiples frame normal vs stretched.
• Price touching ±2σ is statistically extended relative to its own trend.

How to Trade It

Trend-aware mean reversion: buy tags of the lower rail in rising channels, target the centerline; treat closes beyond ±2σ that hold as regime breaks rather than stretches. The channel's slope doubles as your trend filter — no extra indicator needed.

Building It in Setup.Cash

Add TOS Standard Deviation All in the strategy builder — the length input controls its sensitivity — and use its value in any entry, exit, or filter condition. You can also combine it with other tools in the Indicators Lab or via the AI indicator generator. Built from Linear Regression plus StdDev. For the full category overview, see the volatility & statistics library guide.

Volatility indicators qualify trades rather than generate them — backtest your system with and without this filter and compare the drawdowns.