[Achilles]

I think it is best to look at the Most Popular Bets pie chart on Oddschecker.

At the moment it reads

25% Ashleigh
16% Mark
16% Winston
14% Christopher
13% Chris

If Helen makes it into that top 5 before Friday live final, then there is a strong chance of her finishing high up, even winning.
If you take out Mark and Winston, the % of bets placed reflects the order of online polls.

Last Friday Winston was 5th in the morning and by the start of the show, he had jumped to 2nd behind Mark in the most popular bets placed for next eviction. That is why it was not a shock that he was evicted.