Currently Online 
A thought occurs to me. Suppose I was someone interested in creating a narrative that Trump is winning. Suppose further that I have a lot of money (I do not). Suppose I place a heavy bet of say 50 million bet on Trump. Suppose I know that the odds will, in all likelyhood stay at somewhere around 50-50%. Now, suppose I place a 50 million bet on Harris right before the election. If I had done all that, I would have effectively paid for lots of advertising for Trump as news websites post about him leading in the betting markets, with a very minimal risk to myself. If whichever candidate is less favored wins, I'll actually come out ahead. If people were doing this, what would it look like? Well, you'd see Trumps odds spike in Octoberish as people beyond folks like us start paying attention. It would be best for Trump if I waited to pull my money out till as late as possible, but the earlier I do it the better the return if Harris wins. So, if I think that Trump is going to lose, I won't want to wait until election day. About a week before, I would start pulling my money out.
It would look something like this.
or this...
