Banks in USA vary working schedule than in India. In USA Monday through Friday is recognized as "Business day". This day of Monday is treated since the holiday which is assumed as weekends long events. Rest purchasing in India which includes holidays same works together with the USA. There are 10 US national 2010 bank holidays each year so the banks work according them. To exit a lost transaction, the most effective procedure is to issue a "stop loss order". Of course, the only way to do this is by the trader's idea of how much he's willing to lose. If he has set an acceptable level of loss before entering the trade, the only thing he can do is to issue a "stop loss order" once the market has reached that point.