Donchian Mid-Line

[[donchian_mid]] produces the center line of a Donchian Channel. On each candle, it finds the highest high and the lowest low over the length window, then returns the midpoint between those two bounds. It therefore represents the geometric center of the recent range, not the average of the prices within it.

offset can shift this series forward in time. When it is greater than zero, the value available on a candle is the midpoint that was calculated offset candles earlier. This is a time shift, not a forecast.

The line rises or falls as the midpoint of the extremes shifts upward or downward. It can remain flat while price continues to move between the two bounds. A flat line therefore means that the center is unchanged; it does not by itself establish that the market is range-bound.

Ichimoku aliases#

Several Ichimoku blocks reuse the exact same core computation as donchian_mid, with different default values.

These blocks keep their own TOML syntax, but their base calculation is donchian_mid. [[tenkan_sen]], [[kijun_sen]], and [[senkou_span_b]] keep these values fixed. If you need to vary length or offset, use [[donchian_mid]].

Block declaration#

A strategy can contain multiple [[donchian_mid]] blocks. Each block outputs one numeric series representing the midpoint of the Donchian Channel, identified by the value of its id field.

The [[donchian_mid]] block has no source parameter because it is always computed from the candle high and low prices.

Examples#

Minimal setup#

This block computes the Donchian mid-line with the default length 20 because length is omitted.

[[donchian_mid]]
id = "donchian_mid"

Custom fixed setup#

This block uses a custom length value.

[[donchian_mid]]
id     = "donchian_mid"
length = 30

Search for the optimal length#

This block explores a range of values for length to identify the best-performing mid-line length.

[[donchian_mid]]
id           = "donchian_mid"
length.start = 10
length.stop  = 50
length.step  = 5

Shifted equilibrium reference#

This example uses the Donchian Mid as a recent equilibrium level, then applies a shift of 3 candles. The condition becomes true when the closing price moves back above that shifted reference. The example therefore builds a simple filter around a range midpoint that is less sensitive to immediate price changes.

[[donchian_mid]]
id     = "range_mid"
offset = 3

[[condition]]
id            = "reclaim_mid"
condition     = "close > range_mid"
next_block_id = "..."

Parameters#

Note: high and low sources are selected automatically; no source parameter is needed.

Available variables#

Use the identifiers below directly in your expressions. The Donchian mid‑line block exposes one numeric series and its parameters (length and optional offset), together with input sources, symbol, and timeframe.

Assume the block is configured as:

[[donchian_mid]]
id = "donchian_mid"

Then:

Notes

• Numeric variables support arithmetic, comparisons, and logical operators.
• Text variables are strings intended for equality/inequality checks only.