Clicked a few buttons and got "You kept NaN% equity... You get $NaN" That's a surprising result, and not very user friendly. Some ideas to make it better: -

Clicked a few buttons and got "You kept NaN% equity... You get $NaN" That's a surprising result, and not very user friendly. Some ideas to make it better: - make it impossible to get into that state - tell me what I did wrong so I can correct it