The chart below is the price change over time. The yellow line is the price [USD / mBTC] at which actual trades were made. Green and red areas near the yellow line show you maximum and minimum price. Price is shown on the right axis. Bars in the background represent volume (that is, how many coins were traded during that time) enumerated in [mBTC]. The Value for this is shown on the left axis. Below is the cumulative depth chart. About these bars going up and down (if there are any at the moment).
Related: Crypto Currencies