Fisher transform

What does Fisher transform measure?

A transform that turns gentle price waves into sharp peaks and troughs, so turning points are easier to see and easier to rule on.

How is Fisher transform calculated?

Find where each candle's midpoint sits inside the highest-to-lowest range of the last 9 candles, smooth that, then push it through a mathematical stretch that exaggerates the extremes. `trigger` is the same line delayed by one candle, so a crossing marks the turn.

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 Fisher transform in a bot?

In the builder, add an indicator of type fisher (parameters: length, default 9). Its output series — fisher, trigger — become operands 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

• HammerA single candle with a long tail underneath — sellers pushed it down hard and buyers pushed it all the way back.
• Inverse Fisher RSIRSI squeezed into a crisp −1 to +1 signal.
• KDJA stochastic with a third, exaggerated line.
• Know sure thingA long-horizon momentum curve that blends four different look-backs, so it is slow to be fooled by a single fast move.

Or browse all 158 indicators in the full library.