If you zoom the VWAP chart you will see something like this:



The markers are not for every point, but for each point (15-second "slot" as we call it) with trading activity. So here you can see that a large trade activity at 14:29:45 shifted VWAP, but a larger trade volume at 14:33:00 had almost no impact on the price. Removal of the markers will obscure this information.

Of course when you zoom out to default zoom level it starts looking ugly, but we didn't knew how we can improve it without information loss.

In addition you can see here why we chose to plot "buy" and "sell" trades separately instead of joining them with a single line as our competitors do. We show that trades are performed at two different steady prices instead of zigzag pattern you often see on last trade price charts without bid-ask separation and volume weighting: