A reader finds this chart hard to parse:
The chart shows the trend in gas prices in New York in the past two years.
This is a case in which the simple line chart works very well.
I added annotations as the reasons behind the decline and rise in prices are reasonably clear.
One should be careful when formatting dates. The legend of the original chart looks like this:
In the U.S., dates typically use a M/D/Y format. The above dates are ambiguous. "Aug 19" can be August 19th or August, xx19.