![](https://cdn.steemitimages.com/DQma8KfVyAnyssMK4SyhJaZeh7oUcsRw5a5SVhB2MKkYEQJ/image.png)

# Let me try to explain to you:

______________________


So it is better to have everyone with a set price because the less we have with a set price the more impact a single rogue value by 1 witness will have in the median.

If we only have 3 witnesses with a set price lets say: `0.5 0.5 0.5 = >median = 0.5`

If i went rogue and declared a 4th value of 1000 then it will be:  `0.5 + 0.5 + 0.5 + 1000 /4 = 250.375`

**And after a while the queue will only contain that value...**

**The way to protect the price feed from such and attack:**
Since even if the 21 witnesses have the price set and change it to a little value, the median calculation would be:
`(SUM of 21 prices) / 21 ` so 1 witness setting the price @ 1000 even if all witnesses put a very small ammount the median minimum will be `1000 / 21 = 47` 

The only response to such an attack would be to remove votes from that witness until it is out of the shuffle.


**An attack the opposite way** (to reduce the price) 
Would not be very efective because it can only approach to 0 value
**I.E:** `0.5+0.5+0.5 / 3 = 0.50`  /  `0.5+0.5+0.5+0.000000000001 = 0.37`



# Do you get it ?
I never really got a deep interest  in those parts because as a top 100000 witness i had ralely the opportunity to make a block, but it feels good to know and understand.


# Well this post is basically bullshit because i made the mistake of confusing media (which in Spanish would be average) with median which is an statistical term)