yar margin call ka bara main boht he ahat karni parti ha es lay to mauja trading main kafi loss eanred ho ga to ap ko margin call earned hote ha or obht sara loss eanred hota ha or trading main boht loss be ha or trading main kafi profit be earned hota ha. therefore if we are already open position, but you know it will happen false signal is best to close the position as early as possible to reduce losses.