How is it possible price on Coinbase drops below my Limit Order when it is only partially filled?

2

I had a post only limit order place for €172 per ETH, about 50% of the order filled before the price dropped to €171.95, leaving my limit order somehow still open? The order was placed when the price was above €172 so didn't execute as a market order at any point.

This has happened several times on Coinbase Pro, surely the point of a limit order is to the keep the order on the book, so why is the price skipping my order?

TheDream

Posted 2019-09-18T11:03:41.603

Reputation:

1IMHO, this topic belongs to bitcoin SE. In short, cryptocurrency exchange is not regulated, so any answer on how it fulfils the order is highly speculated and opinion-based. It doesn't work like forex trading nor like the stock exchange.mootmoot 2019-09-18T11:20:04.497

Its really more to do with Limit Orders rather than whatever the underlying asset is. – None – 2019-09-18T11:21:51.053

Nice edit but Coinbase is regulated as an exchange so its not speculative and opinion based.. – None – 2019-09-18T11:33:05.877

Quick question: were you placing the order to buy ETH? That seems to be the case from the details in your question, but it wasn't stated explicitly. – None – 2019-09-18T12:00:59.210

Yes was a buy order – None – 2019-09-18T15:20:16.807

I'm voting to close this question as off-topic because it's about a private exchange that may follow different rules – None – 2019-09-18T17:27:15.760

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This appears to be offtopic for bitcoin stackexchange too, not least because Ethereum is not Bitcoin. A question about how Coinbase operate should be directed to them first, I feel; failing that https://www.reddit.com/r/CoinBase/ and https://www.reddit.com/r/CryptoCurrency/ both have significantly broader readership more likely than we to have an answer for OP.

Alistair Mann 2019-09-18T19:51:20.867

No answers