Parabolic SAR

What does Parabolic SAR measure?

A dotted trailing stop that flips from below price to above it when the trend turns. It never moves against you — only in the direction of the trade.

How is Parabolic SAR calculated?

Start the stop at the far side of the trend and step it toward price each candle. Every time a new extreme is set, the step gets bigger — starting at 0.02 and growing to at most 0.2. When price crosses the stop, the trend flips and the stop restarts from the other side.

Written by reading the engine’s real computation, not a textbook — where the two differ, the page describes what actually runs.

How do I use Parabolic SAR in a bot?

In the builder, add an indicator of type psar (parameters: step, default 0.02; max, default 0.2). Its value becomes an operand you can compare in any entry or exit rule. The engine grades the whole rule honestly: real fills, no look-ahead, half the history held back.

Related indicators

• Pascal WMAA moving average with bell-shaped weights, so the middle of the window matters most and both ends taper off gently.
• Wilder MA (RMA)Wilder's moving average — the slow, sticky trend line that sits underneath RSI, ATR and ADX.
• Rolling maxThe highest value another series reached over a recent window.
• Rolling minThe lowest value another series reached over a recent window.

Or browse all 158 indicators in the full library.