1%, 1% / 3900 BTC, Profit
Yeah. The profit line is the total amount the site has won from gamblers since launch. So it's also how much the investors would be up if I didn't charge commission.
The 1% line shows 1% of the total amount wagered. The site has a 1% house edge, and so the 1% line is where we would expect the profit line to be. As you can see, we're nowhere near it, due to a bad run against "celeste" early on.
The "1% - 3900" line is parallel to the 1% line, but 3900 BTC lower. After being 4k down, we expect to stay 4k down. The law of large numbers says that profits will approach 1% given long enough, but that's not because the 4k shortfall gets recovered, it's because the 4k shortfall becomes increasingly insignificant as the profits increase. Plotting the 1% line on all the charts would cause lots of the detail to be lost, so I draw in a parallel line, closer to the actual profit which allows you to see how we're doing this week relative to how we 'should' be doing.
Is that clear? I can try again if not.