I did some more research and found out the answer to my question. I'll post the information here just in case anybody else ever needs it.
http://www.forexfactory.com/showthread.php?t=299608
Basically we're dealing with interopolation :) Now I just need to get my head around how to do it with the stochastic code but I'm sure I'll figure it out.
L

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I've been scratching my head on this one for hours and I'm not sure if I'm making it more complicated than it needs to be.
Most of the MTF Stochs I've seen have the higher TF looking very flat on the smaller TF which makes sense.
I've come across one though that shows the higher TF as smooth and I'm wondering how he did it. My first guess is that he just changed the settings on the higher TF but after playing around for ages I can't get it to look right, so maybe that's not it.
Here's an image of the 'smooth' MTF Stoch so you can see what I mean...
Can anybody offer any clues/advice as to how he's achieving that smoothed effect on the higher TF?
Thanks
L