I found the same difficulty in understanding the rules as they are written, and several members were very gracious in helping me sort it out (I hope!). This is what I came up with (just slightly restated) that makes a little more sense to me (and I was a math major, so I am no stranger to rigorous logic/proof):
Bull-Bear Combined System (EOD Signal for Next Day Open Trade)
Use Bear Signal IF (-1.6 < PPO(EMA5,EMA10) < 1.6 .AND. < Prev Day)
Use Bull Signal Otherwise
Bull Signal - Order of Dominance
1) Long/Cover at RSI5 < 28, Sell at RSI5 > 50, unless
2) NDX > NDX EMA10, then stay Long, unless (but go back to Rule 1 if FALSE)
3) RSI5 > 70, then Sell/Short, unless
4) NASI EMA5 > NASI EMA24, then stay Long, unless
5) NASI EMA5 < NASI EMA24, then Sell/Short
Bear Signal - Order of Dominance
1) Long/Cover at RSI5 < 28, Sell at RSI5 > 50, unless
2) RSI5 > 70, then Sell/Short, unless
3) NASI EMA5 > NASI EMA24, then stay Long, unless
4) NASI EMA5 < NASI EMA24, then Sell/Short
Husk also had a more succinct way of implementing the above. You might also want to look at his recent post #28407.
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