max graph 3 ?

["Stephane Carrasset" <nenapacwanfr@xxxx>]

Tz,

The max graph is 3???
I can't plot graph3 ( the MA(l,20)

with

graph1=ma(H,10);
Graph1color=8;
Graph1Style=1;

graph2=ma(C,20);
graph2color=5;
Graph2Style=1;

graph3=ma(L,20);
graph3color=9;
Graph3Style=1;

Steph