Php/docs/function.trader-bbands
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trader_bbands
(PECL trader >= 0.2.0)
trader_bbands — Bollinger Bands
Description
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.