Looks like odds and evens are separated and highs and lows. Used for trapping. ie: some people see a 1 in 2 dvent occur 7 days, 5 days, 6 days, etc. in a row. Lets say the following 7 combos are drawn:
1) 534
2) 914
3) 091
4) 183
5) 275
6) 392
7) 671
Now you see, the (almost) 1 in 2 dvent that occured 7 times in a row was the Odd Odd Even sequence. That was a little less than 1 in 128 dvent that occured. If it were actually fifty fifty then it would be a 1 in 128. The reason why I say it's "less" than is because half the combos aren't odd odds even and even even odd. The remaining are odd odd odd and EEE. (By the way, I'm not telling this to you Lantern because I'm sure you already know this type of basic filtering.) Now no one here is saying that the probability of Odd Odd Even being drawn on the eighth time is a (just less than) 1 in 256 dvent. The chance of Odd Odd Even coming up would still be a (just less than) 1 in 2 dvent.
There are many likely dvents that can be identified in the pick three. They don't have to be just the obvious ones, like highs, lows, evens, odds, sums, etc. They could be any number groups.
Remember too that playing Martingale is dangerous if you're not ready to take a big hit. Just because tails landed 14 times in a row, doesn't mean that heads is next!