Curved trend line

 

Good day,

I would like to create a curved trend line indicator. It must work like a normal trend line, exept that it must be curved according to a specific equation. It however does not seem possible to do, unless I am mistaken. Any suggestions in this regards will be much appreciated.

Best regards

 
You could construct your curve from segments of straight lines . . .
 

Mine, (see below chart), makes use of polynomial equations form - quadratics, logs, etc. I cant think of other eqns for forex, beyond this.

not sure is this what you wanted when you say specific..."exept that it must be curved according to a specific equation"

can you explain more...thx.