pool/web/yaamp/modules/site/results/graph_price_results.php

<?php

$percent = 16;
$algo = user()->getState('yaamp-algo');

$step = 15*60;
$t = time() - 24*60*60;

$stats = getdbolist('db_hashrate', "time > $t AND algo=:algo ORDER BY time", array(':algo'=>$algo));
$averages = array();

$json = '';
for($i = 0; $i < 95-count($stats); $i++)
{
	$d = date('Y-m-d H:i:s', $t);
	$json .= "[\"$d\",0],";

	$t += $step;
	$averages[] = array($d, 0);
}

foreach($stats as $n)
{
	$m = $n->price;

	$d = date('Y-m-d H:i:s', $n->time);
	$json .= "[\"$d\",$m],";

	$averages[] = array($d, $m);
}

echo '[[';
echo rtrim($json, ',');
echo '],[';

$json = '';
$average = $averages[0][1];
foreach($averages as $n)
{
	$average = ($average*(100-$percent) + $n[1]*$percent) / 100;
	$m = round($average, 5);

	$json .= "[\"{$n[0]}\",$m],";
}

// $a = 10;
// foreach($averages as $i=>$n)
// {
// 	if($i < $a) continue;

// 	$average = 0;
// 	for($j = $i-$a+1; $j<=$i; $j++)
// 		$average += $averages[$j][1]/$a;

// 	$m = round($average, 3);

// 	echo "[\"{$n[0]}\",$m]";
// }

echo rtrim($json, ',');
echo ']]';