I am looking at becoming a Warrant Officer or a Regular Officer in the Army. What are the Retention Points and Promotion Rates for both?

Cant really speak for the Warrant side but for officers I believe its pretty consistent across all fields and branches. Up to captain is automatic with time in service. Takes 4 years. Most Captains who stick around long enough and stay out of trouble make it to Major, 6 to 8 years. From there it gets more difficult. These days you likely will need your masters in order to promote to LTC and above.

I can't speak for the WO side of the house (it's pretty much a secret society and no one else really knows who they operate), but on the Officer wide of the house I can tell you that there is no simple answer to that question unfortunately. Promotion to O-2 is more or less automatic unless you really screw the pooch (DUI, DV, etc). Promotion to O-3 is super high as well. After that it's varies widely based on AOC (officer version of MOS). For my AOC I believe the promotion rate to O-4 was around 45% for the first look. For the second look I believe it jumped to 75% or so. Above that point it continues to get more competitive. With my enlisted time I doubt I stay past O-4 anyhow so that's not a big deal for me. I'm not sure if there is a place on the HRC site where you can see promotion rates by AOC or not. Perhaps some of the more senior officers can chime in with that info.

I have my packet for the board at the end of January so here is hoping to join the warrant ranks. 15 years in and I wish I would have done it much sooner. Go to the usarec warrant officer recruiting page and you can find the next brief in your area as well as can talk to a warrant officer recruiter. Promotion rates are usually in the brief but run 50-90% and warrants can serve over 30 years