Ok so here are some matchups.
vs voldo- Spacing, spacing, and more spacing. While reading the forum and talking to a few players I've come to the conclusion that this is supposed to be a hard matchup. I really don't believe that it is. In this match these moves should be used heavily 1A, 2A, BB (sparingly), 2A+B, and 2B+K. The reason I state these moves is because voldo traverses around bubbles very well. These moves will limit voldo's movement options and they also hit him out of his stances. If you limit the movement then you will be able to use bubbles to set up combos. Remember that voldo can be hit with the double bubble combo.
vs talim- You pray for this matchup. Algol out spaces, out pokes, out damages, and out classes talim completely. Algol's moveset really opens up in this match (well as much as it should open up). Talim should have a really hard time getting in and even if she does then Algol has ways to put her back out or out damage her up close. Unless you are unfamiliar with Talim in general or the player is just plain better than you then you shouldn't lose this matchup
vs mitsu- Mitsu is a high risk/high reward character so punishment is the key to this matchup. If you don't punish, Mitsu is going to eat you alive. With that being said, I believe this is a matchup in Algol's favor. There is a punishment list already so I'm not going to repeat it here, but punishing for max damage is key. Bubble shield is good because mitsu doesn't have many moves that have proberties that get around bubbles so he's forced to step. That is where Algol will be able to use his superior range to catch step and rack up damage. One thing to remember is that if Mitsu knocks you down he has a lot of tech trap options so sometimes it's better to take the ground hit and then get up.
vs Nightmare- I consider this to be one of Algol's harder matchups because of Nightmare's great step and Nightmare's ability to get retarded amounts of damage off of a traded bubble hit. Bubbles in this match shouldn't be spammed nor be predictable or you risk losing 50% health. Double bubble combos do work on him so that is a way to get great damage on Nightmare. Anything that Nightmare does that going into GS can be 2A on reaction. If you do that then you take away nightmare's ability to mix you up.
vs Sophie- The princess of punishment isn't really that hard of a fight if you can keep her at range. Poking should be what you want to do and it will work if you use Algol's great back dash. The thing that will hurt is once she gets in she can punish every low that she blocks. 66A+B at perfect at perfect range and 2B+K are your main moves that will push her back and allow youto backdash to get at range.
vs yoshi- Yoshi can be a troublesome character yet spacing him isn't as hard as it seems. Algol can out poke Yoshi at mid range while staying away from Yoshi's strongest moves and mixups. The moves that Algol can punish with WS B make this fight turn instantly in Algol's favor because Yoshi can be double bubble comboed. Watch out for Yoshi's unblockables because of a lot of them are fast and he has the highest # of unblockables in the game. Algol's lack of a good side step makes it hard to avoid them.
vs hilde- She's the bane of everyone's existance in this game save for a select few. To be honest I don't believe this is a bad matchup. Positioning is the key in this matchup. Because of her amazing side step ability, she has the potential to RO from any whiff. Algol has the unique ability to control large areas of the stage so bubbles at the right range are great. This should turn into a poking match and if it does Algol should win. If you get greedy you will pay a high price.
vs Amy- There are tons of arguments saying that Amy is a direct counter to Algol. I don't believe the hype, even though I have seen videos to the contrary. Yes, she is one of the fastest characters in the game and her B+K auto gi's bubbles. That should really work to her disadvantage. Bubbles us close are a no-no. If you do she will counter and launch you for good damage + wakeup. Mid-range is where you want to be when you shoot a bubble. Also, bait out the counter. Algol eats up whiffs with a well placed 3B, 1B, 11A, or even 66BA. Amy's amazing pressure and 50/50s make her difficult to block against so when you do block a mixup you should punish accordingly.
vs Raph- Suprising Raph out plays Algol at mid-range so I do believe that to win this matchup Algol needs to play an "in & out" type of style. What I mean by that is Algol will pressure from the inside for shourt periods then move out and poke a little past mid-range. Algol doesn't fear Raph's stances at all whenever you see one start you can aB, AA, or any other moderately fast move that the stance doesn't evade to interrupt. Patience is the key here.
vs Seig- My experience in this matchup is very limited, but this is a very winnable matchup. Seig has a very nice soul crush game so GI or really good spacing is key. I choose spacing rather than GI, but that may not work for you. 2B+K and aB are great moves to stop "dancing Seigfried" or a stance changing Seig.
vs Yoda- Why even bother with this matchup? The only time you're gonna even see this matchup is if you're playing Oofmatic. In any case just space out Yoda with BB, and 1A. When he gets in do 2B+K and 66A+B to push him out and work is crappy soul gauge.
vs Yun- If you don't know this matchup you may get soul crushed. Algol's lack of step and Yun's great crush game doesn't bode well for Algol. WIth that said, I am not saying this is a bad matchup at all. This is just one of the matchups that you have to play around with jus tto figure out what works best for you. I think the most common thing that Algol players will have trouble with is dealing with his stance. Using "A" moves or tracking moves stop the auto evade. The low from the stance is highly punishable so if you block that then it's combo time. Remember that bubbles actually work really well in this matchup because besides limiting movement it will stop a lot of his combos if placed right.
vs Cass- cass does so much damage off of the most simple things is rediculous. Tou counteract that you have to fight her at range. If you stay around the distance that you start the match there isn't much she can do. When she gets in you're gonna have problems so get her out ASAP by making her block 2B+K, 66A+B, or 4B A+B. If those moves hit you get either a knock down or good pushback.