https://www.chess.com/article/view/chess-ratings---how-they-work
Basically, the higher the RD, the larger your potential rating swings. The lower, the smaller those swings, in general.
Glicko RD?
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Feb 25, 2016
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#3
The Glicko RD can be seen as the most* your rating should change with any particular game. For example, with a 90 Glicko RD, if you beat someone rated much higher than you, your rating would probably go up around 90 points, and if you lose to someone rated much lower than you, you would probably lose around 90 points.
*probably not an actual maximum, but more likely that your rating should change by less than that amount in more than some high percentage of the possible situations.
someone want to explain what glicko does to me depending if I lose a game or win one. using what I have right know which is 90 glicko RD. please