1. I use Etrade real-time scanners, search criteri
Post# of 103030
https://drive.google.com/file/d/0Bw3SFrWPk62G...sp=sharing
2. High volume is relative to avg volume, therefore detection can start early
3. Find alerts by being on this board, networking, also using social media such as Twitter (can not stress enough what a powerful tool networking is)
4. MM=market maker; you learn them with experience over time and watching plenty of Level II screens. Also remember though MMs playing particular roles often it is not locked in stone and their behavior can change.
The following is a nice blog that gives some good MM info:
http://chedstrading.blogspot.com/2015/11/mark...w-are.html
Hope this helps. have a great day