Supposedly market makers signal each other by executing trades in specific amounts, highly speculative because technically anyone can execute the same trades to 'mimic' a MM signal
100 – I need shares 200 – I need shares Badly but do not take the stock down 300 – Take (or I am taking) the stock down at least 30% so I can load shares 400 – Keep it trading sideways 500 – Gap the stock. Gap can be up or down, depending on the direction of the 500 signal 505 – I am short on shares 600 – Apply resistance at the ASK to keep the price from increasing 700 – Move the price up 777 – Also recognized as a signal to move the price up 800 – Prepare for an increase in trading volume 900 – Allow the stock to float and trade freely 911 – Pending News/Press Release on the way 1000 – Don’t let it run 2100 – Let it run