Do you want to know what the Stalk Market turnip prices are going to be on your island?

They follow rules very similar to the turnip prices in AC:NL.

Each week, you can get one of four preset price patterns for the week.
The first week you buy turnips on your own island, you are guaranteed a gentle BUMP pattern. Turnips will sell for 40% to 90% their base price, then decrease 3% to 5% each half day. Some time between Tuesday AM and Thursday PM, prices will be increased for five half-days.
For two half-days, you& #39;ll see prices between 90%-140%. Then for three half-days, you& #39;ll see prices between 140% and 200%, with the highest price always occurring on the fourth half-day. After the 5-period boost, prices will snap back to 40% to 90%, then decrease 3%-5% each time.
The DECAY pattern starts at 85% to 90% your purchase price, then decreases 3% to 5% each half-day. It& #39;s impossible to make a profit during this week, but you can& #39;t be certain you have it until Thursday PM. Make friends!
The SPIKE pattern also starts at 85% to 90% your purchase price, then decreases 3% to 5% each half-day. Between Tuesday *PM* and Thursday PM, a five price pattern will start. The highest price will be on that third half-day.
SPIKE prices, in order, will be 90-140%, 140%-200%, 200%-600%, then back down: 140-200%, 90-140%. Afterward, prices will randomly hover between 40% to 90%.
The last pattern, TRIPLE, is the most complicated, but it features five days of low prices (80% or less) and seven days of OK prices (90% to 140%). This pattern features a high-low-high-low-high pattern for the week.
TRIPLE& #39;s first and last high phases might not happen at all, but you still always get 7 high days total. the middle high phase always lasts for at least one price. These prices will be 90%-140%.
TRIPLE& #39;s low phases are always 2-3 days each and total 5 days. Prices will snap back to 60% to 80% and then fall an additional 4% to 10% a pricing period.
Lastly, concerning base prices: the base price is your purchase price. EXCEPT the first week you buy on your own island, in which case the base price isn& #39;t known(!) and is somewhere between 90 to 110 bells.
.... And that& #39;s all! Thanks to @_Ninji for their analysis and RE work uncovering the governing mechanisms. I just transcribed from code https://abs.twimg.com/emoji/v2/... draggable="false" alt="💻" title="Personal computer" aria-label="Emoji: Personal computer"> to tweets https://abs.twimg.com/emoji/v2/... draggable="false" alt="🐦" title="Bird" aria-label="Emoji: Bird">.
Whoops, I made an error in this thread. Spikes can start as early as Monday PM. Bumps can start as early as Monday AM.

I keep forgetting when the AC week starts https://abs.twimg.com/emoji/v2/... draggable="false" alt="😔" title="Pensive face" aria-label="Emoji: Pensive face">
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