BitShares Forum

Main => Technical Support => Topic started by: Bear on July 01, 2017, 05:47:44 am

Title: I need help with a sell order failing to execute as expected.
Post by: Bear on July 01, 2017, 05:47:44 am

Hi Everybody

I'm somewhat new to Bitshares. I'm just starting to get a feel for the exchange. Deposited some BTC and bought my first few shares of BTS.

However I want to get clever and start to trade. So I placed a sell order in BTC/bitUSD market.

Here are the details
   
price = 3,200.00000
BTC = 0.01000000
Bitusd = 32.0000

I've just checked and there was a recent rapid price spike (the price got above 3200). Thus I thought the order would get matched into the market.  Alas this does not appear to be the case.

Does anyone have any explanation as to why not?

Best Regards

Bear

 

Title: Re: I need help with a sell order failing to execute as expected.
Post by: pc on July 01, 2017, 09:02:54 am

If you look at the volume of that price spike you'll probably find that it was a "dust" trade.

Because coins are not infinitely divisible, rounding errors in trading are unavoidable. The UI displays trades with their actual trade price (i. e. bought/sold), not with the nominal price of the orders from which the trade resulted. This is a known issue.

Title: Re: I need help with a sell order failing to execute as expected.
Post by: Bear on July 01, 2017, 06:07:09 pm

Hi there

I've Googled "dust trade" but there doesn't appear to be any helpful information.

Could you please elaborate?

I'm looking at the BTC/bitusd chart again from this afternoon (on a 6 hour timeframe with 5 min candlesticks).

There has seemingly been another 4 spikes today when the price tops $3200 and then plunges back down. As to volume I'm not sure what I should be looking for.

There's a spike in volume (at 12pm today) with the first price spike. Then smaller volume with each subsequent spike.

Could you please have a look at this chart and let me know what is going on.

Best regards

Bear

Title: Re: I need help with a sell order failing to execute as expected.
Post by: pc on July 01, 2017, 09:21:11 pm

"dust" is what remains when an order in the book is *almost* filled, except for a couple of satoshis. The remaining satoshis will later be matched with a new incoming market order.

Such a match occurred today (July 1st) at 20:56:24 UTC for example. 0.00000003 BTC were sold for .0001 USD, which means the trade occurred at 3333 USD/BTC. .0001 USD is the smallest possible USD amount, so it would be impossible to match the 0.00000003 BTC in a different way.