MATLAB: How to draw a curly brace outside the gca

curly bracedraw outside gcaoutside gca

Hi I would like to move a curly brace (with the function drawbrace) outside the gca (as the annotations, which can go outside the gca).. Any idea?
x = 1:10;
y = [2 5 4 1 2 4 1 8 1 2];
plot(x,y)
drawbrace([1,3], [1,8], 10)