How to Add Two Lines to a Powerpoint Chart. "Presenters are usually guilty of including too much data in their on-screen charts," says Garr Reynolds, author of Presentation Zen.

A line chart connects a series of data points and is used by traders to monitor prices, currencies, indexes, and other data.

Right now, the line chart doesn’t display the Emphasis series — the value $1,800,000 — as a vertical bar. It’s a round marker. The blue marker is there, but you can’t see it.