1.Drag Product from the to the color shelf or detail shelf.
2. Then add the parameter you created to rows shelf
3. Make sure that your graph type is 'Line.'
This should do.
Also, on your X-axis you can use DATEPART() (for non-unique months, days, hours, etc) or DATETRUNC() (for unique months, days, hours, etc) to ensure that your aggregation against each measure is applied and graphed for each PRODUCT dimension accordingly (ie: you could have a node for each line plotted with the sum of every month, day, hour, etc).