Add a plot for daily P&L

[TradingDominion]

Similar to the current plot for greeks, it would be useful to also see a plot of the daily P&L.
I realize that we have the equity curve which shows the cumulative P&L, but I think it would also be useful to be able to see either a line graph or a bar chart graph showing the daily P&L fluctuations.
This may assist with being able to hunt for a good entry day (ie when we see a larger than average daily loss then we might decide to enter with the expectation that the P&L will mean revert soon).