This type of chart is called accumulated order book:
On the bottom is the price (in this case USD). From the center going left, it shows how many market orders wanting to buy bitcoin at or above that price exist. Going right from the center, it shows how many market orders wanting to sell bitcoin at or below that price have been placed. The height is the number of bitcoins.
This kind of chart can be read as: someone would need to buy 5,000 BTC to make the price 1070 (currently). It also lets you see "walls", prices where large orders will inhibit movement past a particular point.
Don't feel bad, there are also charts that look like this: