By clicking a candle I want to plot High and Low of that candle is it possible?

venkatbabu 

By clicking a candle I want to plot High and Low of that candle is it possible?

You can use something like this which will plot horizontal lines at H, L of bar selected:

plot( c, "", color, style );
selectH = selectedvalue( H );
selectL = selectedvalue( L );
plot( selectH, "", color );
plot( selectL, "", color );

Here there is a more advanced one getting the range of a candle or a range selected by range markers.
Code selected High/Low Range
Selected Bar's range
Range Markers' range