function calculate($ctx)
{
$where = 1;
$where = "status = '" . Contract::STATUS_NEW . "'";
$real_data = RealData::get_cache();
$real_price = $real_data['amount'];
$sql = "SELECT name, strike_amount, ask_amount,";
$sql .= " ({$real_price}*(1+0.1)-strike_amount)/ask_amount as level_10,";
$sql .= " ({$real_price}*(1+0.15)-strike_amount)/ask_amount as level_15,";
$sql .= " ({$real_price}*(1+0.20)-strike_amount)/ask_amount as level_20";
$sql .= " FROM " . Contract::table();
$sql .= " WHERE status = '" . Contract::STATUS_NEW . "'";
$sql .= "order by level_20 desc, level_15 desc, level_10 desc";
$ctx->ds = Db::find($sql);
}
