Updating Grid Data Does not update scatter plot

I have a grid that i would like to update daily and have the embedded plot update with these changes. I update and save the grid however the plot never updates. I am never presented with an option to insert new trace into the existing plot that i have made. So right now i am only able to create new plots each and every time i update the data. This will not work for me going forward as i need to embed this in a site. This is supposedly a key feature of plot.ly I am not able to make it work at all.