Undecideds who remain undecided will stay home. They would have gone to Hillary months ago.
Third party vote - most of them will break for Trump rather than throw away votes on candidates who can’t win.
Hillary will get roughly 40% of the vote - maybe less than her husband did on his first White House run in 1992.
Add it all up, the establishment is still determined to block what is coming and will fall short.
Trump has the potential to really capitalize on the independent/undecided voters. If Hillary does max out at 45% and the 3rd party candidates at 3.5% (cumulative - my guess), that leaves 51.5% for Trump. That would do it, but I think the Electoral college will be closer than I would like (please Trump, somehow get at least 300 EVs).
You vote Third Party when the main candidates have no real differences, as a protest. That’s not the case here. I agree that, in the voting booth, those who are not for Hillary will go Trump.