Gautam.....everything is okay.... but the Trailing S/L moves agin on the High of the 4th Bar from right...on the chart posted.... and that would have closed the Position on the last bar as seen on the Chart... with excellent profit..I presume...!!!
Before shorting take a look at International copper charts, you would come to know that Copper has turned into uptrend (Atleast for now) but since USD/INR came down MCX copper rates havnt gone up much...So have a look an den make ur decision...