function getSellPrice($db, $omc){
		$realPrice = 0; //Init variable for real price.
		$totalSells = 0; //Total number of sells.
		$arr = array();

		$query = $db->query("SELECT * FROM trans censored ;) WHERE category='sell' AND username='example'");
		$buysCount = $query->rowCount();
		if($buysCount == 0){ return "0.00"; }
		$rows = $query->fetchAll();
		foreach($rows as $row){
			$oldTime = $row['timestamp'];
			$newTime = time();
			//echo $newTime - $oldTime . "<br/>";
			if(($newTime - $oldTime) < 99999999){ //99999 is the seconds transactions are relevant
				$omcAmount = $row['amount'];
				$price = $row['pricePerOmc'];
				$nA = $buysCount*$price;
				$arr = array_merge(array($nA), $arr);
			}
		}
		return $this->standard_deviation($arr) / $buysCount;
		//return print_r($this->sd($arr));
	}
function standard_deviation($x) {
	$summation = 0;
	$values = 0;
	$ex2 = 0;
	    foreach ($x as $value) {
	        if (is_numeric($value)) {
	            $summation = $summation + $value;
	            $values++;
	        }
	    }
	    $mean = $summation/$values;
	    foreach ($x as $value) {
	        if (is_numeric($value)) {
	            $ex2 = $ex2 + ($value*$value);
	        }
	    }
	    $rawsd = ($ex2/$values) - ($mean * $mean);
	    $sd = sqrt($rawsd);
	    return $sd;
	}