P&L spread chartin TWS confusion

[Adam777]

I'm not sure what's going on with Interactive Brokers (demo) P&L spread chart for a simple iron condor. I'm comparing it against market chameleon. IB TWS P&L spread chart is completely bellow the zero line and MC looks as expected.

The example is for SNOW 320/325/460/470 (Jan08'21 expire)

see attached:

 

[tommcginnis]

The price between the two platforms seems just a bittttt different. (Quoting Bob Ueker there.)

TWS is looking at quite a different animal.

 

[Adam777]

To all the TWS users, is it best to ignore TWS charts, and do my own p&l spread chart in excel?