Formula to have a line value based on a variation of the Average Line - DAX synthax

[Anonymous]

So here is my chart : 

As you see, the blue line represent variation of a scrap part number, and the orange my average line. 

I would like to add a line value at 20% above my average line and 20% below. When i filter with an other part the line should change considering new variations. 

On this point, the objective is to see the quantity variation between my average line and 20% above and below, for at the end see what is above 20%. 

I hope the definition of this issue is clear ; sorry for my english, i'm a french user. 

any help is welcome ! 

Thank in advance

[vivran22]

Hello @Anonymous 

Your post seems incomplete. Please share more details.

Cheers!
Vivek

https://www.vivran.in/
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[Anonymous]

Don't understand why my post was not completly load... I try again 

So here is my chart : 

As you see, the blue line represent variation of a scrap part number, and the orange my average line. 

I would like to add a line value at 20% above my average line and 20% below. When i filter with an other part the line should change considering new variations. 

On this point, the objective is to see the quantity variation between my average line and 20% above and below, for at the end see what is above 20%. 

I hope the definition of this issue is clear ; sorry for my english, i'm a french user. 

any help is welcome ! 

Thank in advance