Candle Stick Chart

[ghostjat]

Hi,
is this library support Candle Stick Chart type?

[goat1000]

Not exactly, but there is a box and whisker graph which looks very similar. It is described on this page: https://www.goat1000.com/svggraph-misc.php

I could add a candle stick chart quite easily since it is so similar to the box and whisker type.

[goat1000]

I've added a CandlestickGraph graph type in commit b61f1af - here's an example graph using some random data:

<?php
require_once 'SVGGraph/autoloader.php';

$options = [
  'structure' => [
    'key' => 0,
    'value' => 1, // close
    'open' => 2,
    'low' => 3,
    'high' => 4,
  ],
  'axis_font' => 'Arial',
  'axis_text_angle_h' => 90,
  'bar_space' => 5,
  'axis_min_v' => 1700,
];

$close = 1820;
$seed = 1241231;
srand($seed);
$values = [];
for($i = 1; $i < 32; ++$i) {
  $date = sprintf('Oct %02d', $i);
  $open = $close;
  $close = $close + rand(-30, 40);
  $low = min($open, $close) - rand(0, 40);
  $high = max($open, $close) + rand(0, 80);
  $values[] = [$date, $close, $open, $low, $high];
}

$g = new \Goat1000\SVGGraph\SVGGraph(600, 400, $options);
$g->values($values);
$g->colourRangeHexHSL(0, '#0c4', '#0c9');
$g->colourRangeHexHSL(1, '#f00', '#f55');
$g->render('CandlestickGraph');

[goat1000]

This is what it looks like: