Stay away from Thinkmarkets

There was a more than 100 pips of slippage in HSI at today’s 4 o’clock on Thinkmarkets. I contacted the service, who said it’s normal. I’ve checked the data from many other platforms and none of them has such a slippage. The service even told that it was due to the quotation source. How could that be possible? The price of crude oil on their platform is always 2 hours later than the market. And they said it is because of the time lag of mobile trader. I’ve never seen such a problem on other platforms. Stay away from Thinkmarkets.