Weird fill using "CLOSE" button

[M_ichel]

Hi Clayton.

Files sent to you this morning.

Thanks.

[NinjaTrader_Clayton]

Hello M_ichel,

Thank you for writing in.

So we may accurately analyze what occurred with this trade, please send an email to our platform support team with your log, trace, and database files using one of the methods below:

Automatically:

• Within NinjaTrader, go to the Control Center > Help > Mail to platform support...
• Input your email address
• Enter the Subject as "2868033 ATTN Clayton"
• Feel free to share any other information you would like on the situation
• Make sure 'Log and Trace files' and 'Database' is checked to include the requested files
• Send the email

Manually:

• Open the file explorer and go to your "Documents" (sometimes called, "My Documents") folder
• Open the NinjaTrader 7 folder
• Single-click the 'log' folder to highlight it and then right-click > Send To > Compressed (zipped) Folder
• Now do the same thing for the 'trace' and 'db' folder
• Once compressed, attach the compressed files in an email to PlatformSupport[AT]NinjaTrader[DOT]com with the respective @ and .
• Once complete, you may delete these compressed folders

Please follow along with this video if you need some help: Click here for a demonstration of both methods

We look forward to receiving your files and resolving your inquiry.

[M_ichel]

Hi all.
I am testing a strategy. The latest trade, today, in YM had a weird fill.
I entered the trade with a SELL @ 30173 (6 contracts). Seconds later, I closed the position using the CLOSE button. This resulted in a BUY of five contracts @ 30177, which was about the price at the time I hit the CLOSE button, and a BUY of one contract @ 30192!!! This is 15 ticks above the then-current price!!!
Can someone explain to me what happened? And how to avoid this in the future.

(By the way, this trade was in a simulateed account with Interactive Brokers.)

Thanks!