bitcoincharts.com grey bars on exchange currency pair graphs?

[matthewh3]

What do the grey bars mean on the exchange currency pairs graphs on bitcoincharts.com  I know what the green and red mean, bought and sold yeah but what do they grey bars mean.  Thanks.

[N12]

Grey means the price has not changed (within the bar).

[matthewh3]

Grey means the price has not changed (within the bar).

Does it indicate that trades have been made tho the price hasn't changed.  Thanks

[N12]

That’s right.

[matthewh3]

That’s right.

Thanks