For the price difference problem, I suggest choosing the market average price difference. The cost of large spread is too high to work; If the spread is too low, how can service providers make money? Of course, eating you loses money, which is not reliable. Therefore, it is best to choose the average market spread.
In fact, the most important thing to choose a platform is to make money. I have been to so many platforms recently. It's good to see everything when it's good, and the supervision is all this and that. Finally, I couldn't make any money and ran back abroad. Yes, it's best not to choose foreign ones. There are places to run abroad, and you can't come back after running.
It is best to choose domestic ones. He has nowhere to run. China is, after all, a citizen of China.
You can try Jin Daocheng. The platform is quite stable. Although there is no guarantee that 100% will not slip, I don't think it will slip too much because I don't have much data.