Hi,
I’m new here and to bitcoin. I have two question as I used the coinbase app the first time.

A) prices as shown in the bitcoin graph never match the actual buy price.
Bitcoin graph shows today 8k exactly and buy price is 8.152 (eur) i fond this strange?
They also have no price refresh or realtime price near the final buy confirm button, which
Is kinda inprofessional development for such a high volatile chart.

B) coinbase said they implemented a stop action both for buy and sell.
I cannot anywhere find this option, neither the orders tab nowhere in the app (ios latest) nor online in the browser (chrome for ios).
Can someone verify they have this tab??

C) extra question, do you guys randomly buy with luck? I mean a proper trading tool that shows within millisecond changes would be a normal thing even for bitcoin.

Thanks for your help,
And forgive my noob questions.