ThinkorSwim's default settings don't show a very clear priceline across the charts. Also when looking back at previous price history, its hard to tell where price is exactly, so i decided to make a Line plot that sits at current price location. It Plots a Line at the current price value and you may designate the bar length for the line so that it shows to the left across previous price history. You may also change its color, size, and style. You can see in the video price appears as a large green line so you can clearly compare current price to previous price action. 

Priceline

$5.00 Regular Price
$1.27Sale Price