I suppose this is what i require: (Ratio - LLV(Ratio,14))/(HHV(Ratio,14) - LLV(Ratio,14))

Thank you Johnathan! That certainly did help me in progressing. But i continue to encounter one more problem. I'm wondering if there is a short cut to it. What i have done is created an indicator "ratio" by using the function Security("E:\Commodities\Metals\COPPER",C)/Security("E:\Commodities\Metals\GOLD",C)... and then developed the "Stochastic Ratio" by using the FML function that calls "ratio"... and the entire indicator is working perfectly. But the problem is that indicator being created certainly cant be applied to other metals with Gold being the base security. Is there any methodology that can be applied in codification of "ratio" where 1st security (e.g. copper, lead, etc) can be made variable, and by dragging the indicator on any given chart it accepts and plots?.

here is a formula to plot the Stochastic Oscillator on any value you can calculate. The periods of the stochastic are set as variables and then the variable plot is the value the stochastic is to be plotted on:

k:=5;
ks:=3;
plot:=OscP( 5, 34, E, $ );
mod1:= If(LastValue(Lowest(plot))<0,LastValue(Abs(Lowest(plot))),0);
p1:=plot+mod1;
temp:=If(Sum( HHV(p1,k) - LLV(p1,k), ks)=0, 0.0001, Sum( HHV(p1,k) - LLV(p1,k), ks));
csto:=( Sum( p1 - LLV( p1, k), ks ) / temp) * 100;
c[censored]>

You can use the Security function to make any ratio you wish and assign it to plot.