Actually,
It is not a proper term,as it is applied to the modern way of shooting.It is one of the methods used by certain bands of Apache,but not exactly the same.Apache used the thumb to augment the grip.Without a nock point on the string,it is near impossible to use 3 under the way it is used today.Also,to lable it,"The" Apache draw,is missleading.I have seen a pic,with 3 different Apache scouts,useing 3 different drawing techniques.All from the same band,and in the same pic.