[EquisMetaStock Group] SVAPO Question

[Viper Black <udp1645@xxxxxxxxx>]

Hi EveryBody,
   
  I'm using metastock 8, when i tried to run the SVAPO code below, metastock can't recognize this particular code" vtr:= Tema(LinRegSlope( V, period), period);" it said that LinRegSlope "This is not a recognized name, constant or operator." 
  Appriciate if anybody can explain what happen....or i need a higer version of metastock to run this code
  ***************************************
   
  SVAPO METASTOCK CODE
  {calculate the heikin-ashi closing average haCl and get the input 
variables}
haO:= (Ref((O+H+L+ C)/4,-1) + PREV)/2;
haCl:= ((O+H+L+C)/4+ haO+Max(( O+H+L+C)/ 4,Max(H,haO) )+Min
((O+H+L+C)/4, Min(L,haO) ))/4;
period:= Input("SVAPO period :", 2, 20, 8);
cutoff:= Input("Minimum % price change :", 0, 10, 1);
  {Inputs for standard deviation bands}
devH:= Input("Standard Deviation High :", 0.1, 5, 1.5);
devL:= Input("Standard Deviation Low :", 0.1, 5, 1.3);
stdevper:= Input("Standard Deviation Period :", 1, 200, 100);
  {Smooth HaCl closing price}
haC:= Tema(haCl, period/1.6);
  {Medium term MA of Volume to limit extremes and division factor}
vave:= Ref(Mov(V, period*5, S), -1);
vmax:= vave*2;
vc:= If(V < vmax, V, vmax);
  {Basic volume trend}
vtr:= Tema(LinRegSlope( V, period), period);
  {SVAPO result of price and volume}
SVAPO:= Tema(Sum(If( haC > (Ref(haC, -1)*(1+cutoff/ 1000)) AND
Alert(vtr >= Ref(vtr, -1), 2), vc, If(haC < (Ref(haC, -1)*(1-
cutoff/1000) ) AND
Alert(vtr > Ref(vtr, -1), 2), -vc, 0)), period)/(vave+ 1), 
period);
devH*Stdev(SVAPO, stdevper);
-devL*Stdev( SVAPO, stdevper);
zeroref:=0;
zeroref;
SVAPO

       
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