when you click on the box with the daily/monthly estimated sales that takes you to the profit calculator/ list Item/ historical data popup. when you click on historical data it takes you to the line graph. you can click on each color box at the top of that screen to deselect the line colors on the graph. that way you can focus just on the data you want to help eliminate confusion. the graft is set with time frame across the bottom and the price it sold for on the left. hope this help to narrow down for the info you need to make pricing decessions.