# Smoothed Spot Index Price

The raw spot price fetched from the underlying oracle **is not used directly but undergoes a specific exponential moving average (EMA) method to smooth the fluctuation.** This ensures that the spot index price cannot be easily **manipulated for the market's stability,** as the fluctuation directly impacts mark price, which determines the safety of all positions. 

<figure><img src="/files/schsjXJrWCj6sg79BtGf" alt=""><figcaption></figcaption></figure>


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