Could someone explain TWS's What-If feature?

[averagejoe]

So I was looking at this tool trying to keep track of possible scenarios and adjust where needed. But I am getting confused by the results of this tool is generating. Anyone know how it works and how it should be used?

Here is yesterday graph of my account:

Here is today's (nothing was sold or bought or expired or executed):

 

[nooby_mcnoob]

Same. May want to see if they have webinars on it.

 

[Overnight]

Don't they have a help file or general user manual to explain their features?

The first chart seems to show that you would be happy with the results, the second shows that you would be sad with your results.

 

[averagejoe]

Their manual is not really helpful to find out how it works and why such a drastic difference between two days. And yes @Overnight, i would prefer my yesterday's scenario over today's

 

[nooby_mcnoob]

probably somthing to do with how the price change is related to its beta with respect to the underlying