README

A pure PHP implementation of technical indicators for trading, including the Relative Strength Index (RSI) and Stochastic Oscillator. No native extensions (e.g., Trader PECL) are required, making it portable across PHP environments.

Installation

Install the package via Composer:

composer require geoffroy-pradier/php-trader

Requirements

• PHP >= 8.2

Usage

Relative Strength Index (RSI)

Calculate the RSI for a series of closing prices:

use GeoffroyPradier\Trader\Rsi;

$prices = [100, 102, 101, 105, 103, 107, 110, 108, 112, 115, 113, 118, 120, 122, 119];
$rsi = Rsi::calculate($prices, 14);
print_r($rsi); // Outputs array of RSI values

Stochastic Oscillator (%K and %D)

Calculate the %K and %D lines for high, low, and closing prices:

use GeoffroyPradier\Trader\Stochastic;

$highs = [101, 103, 102, 106, 104, 108, 111, 109, 113, 116, 114, 119, 121, 123, 120, 126, 124];
$lows = [99, 101, 100, 104, 102, 106, 109, 107, 111, 114, 112, 117, 119, 121, 118, 124, 122];
$closes = [100, 102, 101, 105, 103, 107, 110, 108, 112, 115, 113, 118, 120, 122, 119, 125, 123];
$stoch = Stochastic::calculate($highs, $lows, $closes, 14, 3);
print_r($stoch['k']); // %K values
print_r($stoch['d']); // %D values

Testing

Run the PHPUnit tests to verify functionality:

composer test

Development

To contribute:

1. Fork the repository on GitHub.
2. Add your changes and include corresponding PHPUnit tests.
3. Submit a pull request.

License

MIT