Hi mate, I watch the DOM for a couple of weeks only and just start seeing things (when they are huge as this one). Before this reversal there was 3 others (in one hour time) with a quiet tinny volume on top, less than 100, and not really easy to be sure.
This one is very easy to see, 1200 contracts traded at the top and price never goes Bid, I was able to spot it immediately and just share the moment. I think I neend some more time of the monitor time before being sure to take those 3 ticks profit.
Hope this video is usefull to some people triyng to undersatnd the DOM.
By the way, there is a tread of someone gave up the regular job just for watch the DOM. I can just suggest to keep the job but register the trading cessions (I use the Camtasia for screen recording) and just convert the recording into MP4, easy to rewatch at any time.
Regards