Thanks.
I'll need to revisit this guide

Just got the achievement, this guide is missing 14 traders in Rhombus Square. They're on the top floor of Buy Land (consumable store right next to the gear store). If you're still missing traders, I would recommend checking your unlocked traders (Records -> Trader Book) and comparing their trades to the ones on the wiki (don't check the general traders page as it's uncomplete, check the traders from each zone separately i.e. [ https://crosscode.fandom.com/wiki/Rookie_Harbor#Traders ]). I made that mistake and had to revisit like 3 or 4 traders because I thought I had them already fully unlocked.

For anyone stumbling upon the guide and missing traders, take into consideration that you have to unlock all trades of each trader to consider it "completed" (this includes some quests). There is a list you can check in Menu -> Records -> Statistics -> Collection to see where to look at. Here's mine [ https://i.postimg.cc/nr7F0SG8/image.png ] and you can see that some numbers are off. That's because the game counts unlocking trades as separate traders.

About Rhombus Square, there are actually 28 traders

Okay 👌
Cheers, I'll look into it

It was revealed to be a bugged trader. Although the count between the guide and the stats doesn't add up anymore, so it might need to be revised.

Alright, I'll have to double check everything again when I get a spare minute.

So where do we think this new Trader is?

Needs to update. I got 164/??? and that achievement is at 99.39%
According to an algebra hell, I'm missing exactly 1(ONE) trader!

@REnder Scott oh yea, i exhaustively checked them all

@Brugg for some reason, gaia's gardon updated and now i have them all