Quote from Tea: How about a yellow or red light that lets you know if your connection has been interrupted or lost.
TWS and the IB server exchange a "heartbeat" messages every 15-30 seconds (or so). If TWS stops getting this heartbeat, it tells you it's not connected by showing a magenta grid over the whole quote screen. When it reconnects, the grid goes away. That's your indicator.
If your quotes freeze up without this happening, it's likely you have an intermittent problem, where the heartbeats are getting through, but some packets are still being dropped. This is usually related to ISP connectivity, though it can also be drivers/hardware on your machine.
TWS and the IB server exchange a "heartbeat" messages every 15-30 seconds (or so). If TWS stops getting this heartbeat, it tells you it's not connected by showing a magenta grid over the whole quote screen. When it reconnects, the grid goes away. That's your indicator.
If your quotes freeze up without this happening, it's likely you have an intermittent problem, where the heartbeats are getting through, but some packets are still being dropped. This is usually related to ISP connectivity, though it can also be drivers/hardware on your machine.