MMR is only based off winning and losing, promotion is only based of MMR. Some of the actions you do will correlate with an increasing MMR, or having a particular MMR, that do not effect promotion.
I.e. win rates. As you win more, your MMR will increase, it stands to reason however that by the nature of increasing MMR through wins people associate win streaks / win ratios or even points as a factor of being promoted, when in fact it's simply a trait of increasing your MMR.
Also - win rates vs the league above. You don't need to achieve an xx% win rate against the league above you to get promoted. You do however have to have a higher MMR than the cutoff for the league (plus a confidence interval). Therefore having a positive win ratio against people with a MMR above the cut off (I.e. the league above) will allow you to increase your MMR and get promoted. Again people associate this winning against higher leagues as a 'requirement' when it's simply your MMR is around the cut off abd you're more likely to be matched against people with a similar MMR.
Blizzard have stated this multiple times. It's similar to an ELO rating. I can't find the specific posts because I am at work, but it is basically Wins versus Losses, but it takes your opponents rating in to consideration when determining how much your rating moves up or down.
This article has some information on how it works and why it is only Wins/Losses. Sauce. There are two updates at the bottom pointing out that Sirlin didn't know your MMR is different from your displayed rank, but the basics of it are correct. There is also a link in the second update to a TL thread about it.
Your MMR determines who you are matched against. If you have a high winrate, >60%, then you are beating people at your ranking so they system will start matching you against harder opponents. When it levels out again, if you're playing against people in the division above you you will be promoted.
Blizzard do this in their other games too, so we can be fairly confident in understanding it pretty well based on those (though it'd be wrong to assume it's identical)
Not sure why they hide your actual MMR and instead give you the ladder points, but I guess because MMR can fluctuate so much it might get depressing for people to have a string of losses.
MMR also has alot of math involved beyond just a certain set number I believe
There is an uncertainty factor to your MMR to offset bad days and good days
All your MMR questions can be answered here, here and here.
Warning, you are in for a lengthy read if you want to read all of them.
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Azz had a chance at this one point in the game where he had a nexus and 6 probes. But he found a way to **** it up from there 3 times in a row - Iaguz
No way SEA needs 1400 points to get gm, i watch the sc2rank points of people pretty regularly to see my competition and most people i see get promoted around 950-1000 points or so ^_^
The 1400 total is a 99% guarantee that after placement next season you will be promoted. You can be promoted before you reach the 1400 points needed during the season by meeting the other requirements (ie. Top 200 MMR, Good win/loss ratio, spots available in GM)
I'm pretty sure you can still climb your division ranking...
You definitely can. Just can't get promoted and your bonus pool doesn't grow.
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Azz had a chance at this one point in the game where he had a nexus and 6 probes. But he found a way to **** it up from there 3 times in a row - Iaguz
Well I came close to a promotion, but on the final day I dropped 5 straight games and called it quits for the day. Now to work on bumping up my MMR so I get promoted early in Season 6!
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