"I checked the course of trades and there was 100 shares traded...

"I checked the course of trades and there was 100 shares traded at the CMC price in the 9 seconds before 10:00am which brought down the price from 43.78 to 43.61 (CMC open) and it was back up to 43.78 in 3 seconds" - Fair enough to have a crack at someone if you've got a valid complaint, but that just isn't true. I've had a look at the course of sales and the match for BHP was at 9:59.51 in other words 9 seconds before 10am. 43.78 WAS the opening.

Don't blame your CFD provider just because you're getting your trades wrong. The buck stops with you bluroket. Once you can admit that it's you making the mistakes you'll start to learn from them and you'll start to improve your trading. Blaming others for your mistakes is for kids and idiots - which one are you?