I'm sure you are familiar with multiplication:
M15-H1-H4
if you transfer all to minutes you get: 15-60-240
how are these numbers related?
M15 to H1: 15x4=60
H1 to H4: 60x4=240
so: if EMA9 is the short-term bias indicator on M15 and you want the same short-term bias on H1 - what do you do?
yes: you multiply it by 4
Now: H1-H4-D is a somewhat more demanding formula. But I am sure you can work it out.
(Having said that I realised that Xard's EMAs9-36-144 have strong similarities - only in practical trading terms - with the Fibonacci numbers 8-34-144; therefore - at the moment - I think that the Xard formula - as the slightly deviating Fibonacci one - may be applied universally because markets are fractal. But I may be wrong, of course.)