When I played Mello yesterday at 11:58, the price at Pinnacle was +110 or greater on Giraldo. I could be wrong there ... but it was definitely +EV and I was anticipating a scalp after watching the market move. I went back at 15:30 to see that Giraldo had been moved to +110, with my book over adjusting to earlier action on Mello giving me -110 on Giraldo. At that time I realized that I had misread the market, and decided to get out of it and just get "juiced". The line closed at -169/+150 at Pinnacle, giving my price on Giraldo at -110 a 16.64% edge on what I have classified as "market price". Whereas my line on Mello at -110 gave the book a 25.73% edge seeing how the book would be receiving +110 on the other side. I bought back a winner, but I still believe it was the correct play at the time.
There are two sides for a scalp: the Pinnacle side and the soft side. Pinnacle has higher limits and lower juice than every other bookmaker in the industry. The theory I subscribe to is that scalpers would be giving back a good chunk of their profits by playing those numbers at Pinnacle. I trust that their lines are more accurate than anyone else's and there's no "value" there. When they move their numbers, the entire industry takes notice. Exchanges such as BetFair and Matchbook have nothing that is +EV on Pinnacle's number (after factoring in commission). Sites like, Sportsbook.com, Bodog, Sportsbetting.com which I use to bet Tennis have significantly smaller limits and much higher juice, meaning they're less confident with the numbers their book puts out there. That's what makes them the "soft side".