Is there any place where I can find bid/ask spread information for SIX and other European markets (as live as possible). As far as I can tell (please correct me if I am wrong) my broker Degiro does not provide bid/ask spread information. It only provides information on the last trades that were made. I understand that for example InteractiveBrokers provides information of the form Ask: 3.8420 x 100,000, Bid: 3.8295 x 11,819. Which shows how much stock is guaranteed to be available at what price for how many units before the price moves (important caveat the data is delayed by 15 minutes I believe). Is this kind of data available for free and for what stocks/ETFs.
I would be interested in data on for example:
Vanguard ESG Global All Cap UCITS ETF (USD) Acc (SWX | V3AA | IE00BNG8L278 | CHF ) traded in CHF on SWX . (Degiro calls the swiss stock exchange SWX even though it is now called SIX).
(For some reason Degiro has no historical information at all on this ETF, not even the last trades. I asked support about this and they blamed their third party historical data provider.)