Hi! I understand that a system is robust if input values form flat areas on the 3-D chart where the third axis is the Profit or Drawdown. I attached the example of this chart. But what to do with multi-input models. Say, I have a system with 5 inputs - so there will be 10 charts with different input couples to consider against the corresponding PROFIT surface. I wonder if there is a systematic way to identify system robustness without having to use the 3D charts. Rina's SmartView uses the robustness function which is very interesting. Any opinion is highly appreciated! Dima PS: given that each of the above inputs has 20 different values - the 3 million possible combinations can be very hard to represent on a chart - much less if there are billions of possible combinations.