Bollinger Lower Band | Bots And Strategy | Help Center

Bollinger Lower Band

What SteadyEdge calculates

This page documents the exact runtime calculation for the listed filter IDs. Formula symbols use O , H , L , C , and V for the current candle open, high, low, close, and volume; p is the configured lookback.

- Registry filter IDs: bollinger_lower

Exact formula

middle = SMA(C, period)

std = population standard deviation of C over period

lower = middle - std_dev*std

Parameters, defaults, and bounds

- period : default 20 ; 2–100

- std_dev : default 2 ; 0.001–50

How the rule passes

above requires a strict > comparison.

below requires a strict < comparison.

Data, timing, and warm-up

Candle filters use the rule timeframe and the latest candle at or before the evaluation time. A non-finite calculated value does not pass.

Every rule in the same filter set must pass. Test Filters and a backtest validate the complete set.

- Filters Reference

- How Entry Filters Work

- Timeframe, Operator, Value, And Params