trailing stop language help pls

["ChasW" <cwwaring@xxxxxxxxxxxxxx>]

I am trying to step down to different std dev bands as stops.

N's are the outside top and bottom bands and the M's are the middle bands.

so in this case i short at the N+1 (top band)
and as the price comes down to the middle upper band (M+1), i lower the stop 
to this N+1 band.
as the price contiues down thru the next middle band  (M-1), i then lower 
the stop to the prvoius band (M+1)
and so on...


my exit code look like this
{Buy to cover}
If MP<= 0
 then begin
If Close < Mplus1 then buy to cover ("SXN+1") next bar Nplus1 stop else
If Close < Mminus1 then buy to cover ("SXM+1") next bar Mplus1 stop else
If Close < Nminus1 then buy to cover ("SXM-1") next bar Mminus1 stop; end;


the problem is that the only stop that seems to be in force is the first 
one.(n+1), i can see that it stays 'true' so no reason to go past the 'else'
any help would be appreciated

chasw