Arabic parts, antiscia how can?

1
I noticed often when the asc, mh is 0 degree, a high odd priced winner win at times.

And not at other times?

Chiron, south node conjuct axis produces high odd winners

However the mh changed sign and 0 degree some time ago and no high priced winner, why is this? Do I have check the odds?

Or can it mean small change?

what do you mean by look at Arabic parts, antiscia? It's needs a square to Indicate a long shot will win?