Gender predictor ring test

Alayna • Married 10/18/14. Have 3 kids (2 natural and 1 through marriage) and Pregnant with baby #3 due 7/11
Have any of you tried it? You put your ring on a string and hold it over your tummy. The results are confusing because some people say back and forth is boy, circle is girl and reverse. I did it with my daughter, and it went in a circle. Now I've done it and it went back and forth. 
I'm hoping for a boy :p