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trader_avgprice	trader_beta

Trader Functions	Last updated: Mon, 26 Oct 2026

trader_bbands

(PECL trader >= 0.2.0)

trader_bbands — Bollinger Bands

Description

function trader_bbands(
    array $real,
    int $timePeriod = ?,
    float $nbDevUp = ?,
    float $nbDevDn = ?,
    int $mAType = ?
): array

Parameters

real: Array of real values.
timePeriod: Number of period. Valid range from 2 to 100000.
nbDevUp: Deviation multiplier for upper band. Valid range from TRADER_REAL_MIN to TRADER_REAL_MAX.
nbDevDn: Deviation multiplier for lower band. Valid range from TRADER_REAL_MIN to TRADER_REAL_MAX.
mAType: Type of Moving Average. TRADER_MA_TYPE_* series of constants should be used.

Return Values

Returns an array with calculated data or false on failure.

trader_avgprice	trader_beta

Trader Functions	Last updated: Mon, 26 Oct 2026