Normalized Average True Range

# trader_natr

(PECL trader >= 0.2.0)

trader_natr — Normalized Average True Range

### 说明

function trader_natr(
array `$high`,
array `$low`,
array `$close`,
int `$timePeriod` = ?
): array

### 参数

`high`

  高价，浮点数数组。

`low`

  低价，浮点数数组。

`close`

  收盘价，浮点数数组。

`timePeriod`

  Number of period. Valid range from 2 to 100000.

### 返回值

Returns an array with calculated data or false on failure.

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