> roundTicks: Used to round price with tickSize. Example: `roundTicks(0.12345, '0.001') = 0.123`
```php
function roundTicks($price, $tickSize) {
        $precision = strlen(rtrim(substr($tickSize,strpos($tickSize, '.', 1) + 1), '0'));
        return number_format($price, $precision, '.', '');
}
echo roundTicks(0.00016552, '0.00000010');
```