Hello. so that is the question. is it possible ?
c1 = new TCanvas("c1","Example of Gaxis with arrow",10,10,700,500);
c1->Range(-10,-1,10,1);
TGaxis *axis1 = new TGaxis(-4.5,-0.2,5.5,-0.2,-6,8,510,"");
TArrow *arrow = new TArrow(5.5,-0.2,6.0,-0.2,0.02);
axis1->Draw();
arrow->Draw();