The other two lines are related to: VWAP of VIX price minus the VIX spot price. So the weighted premium of the near term (I think).
Green is the long (50 day) moving average of the of the above value.
Pink is this: short_ma = (((v_rsi - 50) * 1.5) + 50, 30) -- and to be honest I have no idea what I was thinking here, 50 is the mid line on the oscillator... idk
Anyway, it shorts when the yellow line is >60 AND the green line is above the pink line
and just closes when the pink crosses back over the green and the is < 50