trader_avgprice
trader_beta
Trader Functions
PHP Manual

# trader_bbands

Bollinger Bands

### Description

array trader_bbands ( array `$real` [, integer `$timePeriod` [, float `$nbDevUp` [, float `$nbDevDn` [, integer `$mAType` ]]]] )

### 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.