[amibroker] Interpreting A Code Segment

["Ken Close" <ken45140@xxxxxxxxx>]

I would really appreciate it if someone could tell me exactly what the
following code snippit is doing.  This is part of someone's custom code to
rank, using positionscore, the relative strength of symbols relative to
Guppy MMAs.
 
Here is the code portion I just cannot understand...can someone explain in
words.
 
// walk through the watchlist grabbing all the symbols to calculate RS vs
ourself.

List = CategoryGetSymbols(categoryWatchlist, WatchlistNum);

for(i=0; (sym = StrExtract(List, i)) != "";i++)

{

if(sym != Name())

{

f = RelStrength(sym);

st3 = EMA(f, 3);

st5 = EMA(f, 5);

st8 = EMA(f, 8);

st12 = EMA(f, 12);

st15 = EMA(f, 15);

Lt30 = EMA(f, 30);

Lt35 = EMA(f, 35);

Lt40 = EMA(f, 40);

Lt45 = EMA(f, 45);

Lt50 = EMA(f, 50);

Lt60 = EMA(f, 60);

So, it walks thru a Watchlist, and sym gets set to the symbol name.

f is obviously the RelStength compared to the symbol, but what is compared
to the symbol...????  itself????

st3 then becomes the 3dema of this rel strength but what are the two
components of the Relative Strength comparison?

I will post the entire code on a followup message, once I can understand
just what is happening.

Thanks for any expert explanation of this.

 

Ken