Quote from bluegreen:
How is 390 minutes in a trading day divided into 13 mintute time frames? Ok, so there are 390 minutes in a trading day. Now what? How does he come up with the 13 minute time frame? What does he divide to get 13? This makes no sense.
I think this is what he means: 390/13 = 30 or
390/30= 13 Some people are hung up on symmetry