Lost Connection 22/07/2024

[victor68133]

Hi There,

Yesterday I lost a connections both NT8 and Tradovate.
I spoke with my VPS provider and they said that isn't from their end.
Please advise.

[NinjaTrader_Clayton]

Hello victor68133,

Thank you for the note.

When we see messages about "Connection Lost", "Slow", or "Unable to reach the server", this normally means that the Internet, Modem/Router, or another program is stopping NinjaTrader from maintaining a stable connection to the necessary servers.

• Since this is happening on a VPS you will have to get them to help you investigate the behavior further as NinjaTrader Support is limited in what we can do for connection loss issues.

Please know that a connection state between NinjaTrader and your broker/market data vendor is not dictated by NinjaTrader.

• The NinjaTrader application only reports the connection state as it is reported by the API you are connected through.
• NinjaTrader behaves like a radio receiver in that it receives signals from the connected server. If the signals are not coming through, the underlying broker/market data vendor API reports this to the NinjaTrader application which in turn reports this back to you. Once a loss of connection is reported, NinjaTrader or the underlying API will continuously try to re-establish a connection.
  • There isn't a "Stop losing connection" button or checkbox within NinjaTrader so if the connection is being lost, it is because something outside of the platform is not maintaining the necessary connections and needs to be addressed.

Please perform the steps below to troubleshoot the local network and narrow in on what could be causing these network/connection issues. Please restart NinjaTrader after each set of steps and try connecting again.

• Begin by restarting your Modem, Router, and PC to refresh the internet connection.
• Connect your PC directly to the Modem with an Ethernet cable if possible.
• Ensure that NinjaTrader has been allowed through the Windows Firewall on all networks. Please follow along with this infographic:
  • Click here to see the infographic on allowing NinjaTrader through the Firewall
• Ensure that NinjaTrader has been added to any 'Exceptions' or 'Allowed Programs/Apps' kind of list within your antivirus software.
  • If you need to add NinjaTrader manually, the file path is as follows:
    • This PC > Local Disk (C: > Program Files > NinjaTrader 8 > bin > NinjaTrader.exe
• If you are using a VPN, turn it Off
• Clear your DNS
  • Open the Command Prompt by clicking the Windows icon and typing "Command"
  • Select 'Command Prompt'
  • Either copy and paste or type the following command: ipconfig /flushdns
  • Press Enter to make it run

Reopen NinjaTrader and test if the unwanted connection behaviors continue.

If the connection issues continue, please let us know and we will provide some additional steps to narrow in on what is preventing NinjaTrader from connecting to the necessary servers and maintaining a stable connection. If you are still losing connection, you will need to reach out to a Network technician or your Internet Service Provider for further help investigating what is preventing NinjaTrader from maintaining a stable connection to the necessary servers.


Please let us know if we may provide any further assistance.

[backtester831]

Hi There,

Yesterday I lost a connections both NT8 and Tradovate.
I spoke with my VPS provider and they said that isn't from their end.
Please advise.

Who is your VPS provider? Too many of them don't provide any help with Ninja and are clueless.

I've been using NinjaMobileTrader VPS for multiple years now and have never lost connection (except for the time when it was down for everyone) on my NinjaTrader, Tradovate, and Rithmic connections, and they also specialize in helping with the actual NinjaTrader application.

[victor68133]

Hi backtester831,

I'm using Dipgate VPS.

[backtester831]

Hi backtester831,

I'm using Dipgate VPS.

Oh yes, I've tried them because they were a little cheaper than ninjamobiletrader vps and I had a new strategy I wanted to run on it's own machine, but had a bad experience with Dipgate because of the disconnections and their support doesn't have any ninjatrader expertise. Ended up not even using the whole month with Dipgate and just switching the new strategies back to ninjamobiletrader vps