Anjali, thanks for your response.
Sorry for my last post, datapoints were fine but scale was very far scattered. dataPoints were in 10^6 and datapoints2 were in 10^9, which is why both were not being shown properly. (@admin:last post can be deleted). However, is there a way to automatically scale line graphs. eg. say 1 line graph has values in 10^2 and other line graph has values in 10^8 . Is there a way to show both lines on 1 graph (using scaling for y axis)