How a Profitable Weather Bot Works on Polymarket: Full Pipeline from Forecast to Order (BOT PIPELINE)
Most people think weather bots require complex AI and tons of code
In reality, top bots run on a simple, understandable pipeline that you can build over a weekend
> Core Pipeline
1. Market Discovery
Scans active temperature bucket markets
2. Forecast Ingestion
Pulls 3–5 models (ECMWF, GEFS, HRRR, NWS, UKMO).
Data must be for the exact resolution station
3. Calibration
Raw models have systematic bias. Top bots correct each model per city and lead time using historical residuals
Simple decaying average bias correction already gives a noticeable boost
4. Probability Calculation
After calibration, converts the ensemble into probabilities for each bucket
5. Edge Detection
Compares calibrated model probability to market price. Only trades when edge ≥ 8%
6. Sizing & Execution
Fractional Kelly + hard caps, limit orders, circuit breakers
> About Paid Models
Many top accounts use not only free sources (Open-Meteo, NOAA) but also paid ones (Visual Crossing Pro, Tomorrow, proprietary AI models)
Paid sources often provide better short-range accuracy and cleaner station data
A 0.5–1.5°C difference on short horizons can significantly impact edge in narrow 1°C buckets
Good balance: free ensemble for baseline + 1–2 paid sources for final calibration
> Why This Works
- Models update on schedule → edge appears predictably
- Calibration removes systematic errors
- Automation lets you catch hundreds of micro-trades per day
Many think the model is good and calculate probabilities immediately
Winners first fix the bias, then calculate edge
If you want the next post - I can break down how to do simple and effective bias correction on historical data
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THE TEMPERATURE LADDER STRATEGY THAT TURNS POLYMARKET WEATHER INTO ASYMMETRIC EDGE (LADDER EDGE STRATEGY)
Most traders pick one most likely temperature bucket and hope it prints
Ladder traders do something smarter: they spread small money across 3–4 adjacent buckets so that whichever one resolves pays the whole stack
This turns weather markets into a positive-skew game where one correct bucket more than covers the cost of the losing ones
[why ladders work so well on short-horizon markets]
Models give a point forecast that falls into one bucket
But that point is often off by 1–3°C, sending the real temperature into a neighboring bucket
Buying the whole cluster cheap (ladder usually costs under $1) means you don’t need to guess the exact number
You just need the actual temperature to land in one of your buckets
[how to build a strong ladder in practice]
Example for Singapore (cluster 29–31°C):
- 29°C @ 0.2¢
- 30°C @ 15¢
- 31°C @ 35¢
Total: ~$0.50. One winning bucket at 100¢ makes the position profitable
[when this edge shines brightest]
- Transitional days when models disagree
- 24–48 hour horizon (D+1 and D+2)
- Volatile cities like Singapore, Miami, Tokyo, Shanghai
- Right after a fresh model run before the market reprices
Add an underdispersion filter (ensemble spread tighter than historical) and the win probability rises noticeably
Ladder + basic ensemble check is one of the cleanest asymmetric plays on Polymarket right now
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Tail Risk Buying on Polymarket: How to Buy Extreme Buckets and Catch 10–20x When Everyone Else Is Scared (TAIL EDGE STRATEGY)
Most traders avoid far-tail buckets on temperature markets
Smart money does the exact opposite - they quietly farm the fattest alpha there with minimal risk
> Why Tail Buckets Are a Hidden Goldmine
Ensemble models (ECMWF, GEFS, HRRR) are almost always underdispersive - they draw too narrow a range of possible temperatures
The market is even more scared of extremes. As a result, the farthest buckets (hottest or coldest) chronically trade at 4–12¢, while real probability is often 18–28%
One good tail hit per month easily pays for dozens of small losses
> 4 Key Principles
1. Underdispersion Check
If the ensemble spread is noticeably narrower than historical volatility for that city and date - tails are almost certainly underpriced
2. Climatology Anchor
Check how many times in the last 10–15 years the temperature went into a similar extreme on that exact day
3. Consensus Filter
Only buy when at least 2–3 independent models show the possibility of an extreme. If all models are stuck in a tight corridor - skip
4. Position Sizing Rule
Small bets only: 0.5–2% of bankroll. Even if 8 out of 10 tails lose, one big winner more than makes up for it
> Real Example (London, EGLC)
• Max Temp tomorrow market
• The >28°C bucket was trading at 7¢
• Ensemble + climatology showed ~21–23% probability
• 36 hours later it resolved at 29.1°C → 100¢
• +1320% on the position
> When This Edge Works Best
• Strong heatwaves and cold snaps
• Transitional days with fronts (when models disagree)
• Tomorrow and day-after markets (D+1 and D+2) - underdispersion is strongest here
• Volatile cities: NYC, Chicago, London, Tokyo, Shanghai, Miami
Tail buying combines perfectly with near-resolution and calibration edges
It’s a positively skewed strategy: you rarely lose big, but when you hit - you win very fat
Many top accounts in 2026 are crushing it exactly thanks to systematic tail buying
Save this post so you don’t lose it!
How to Turn Ensemble Underdispersion into Consistent Profit on Polymarket Temperature Markets (BLACK BOX STRATEGY)
If you’re still trading Polymarket temperature markets using only a single number from GFS or ECMWF - you’re leaving one of the fattest and most sustainable edges of 2026 on the table
The real quant alpha on the 24–48 hour horizon isn’t in the temperature itself. It’s in Ensemble Spread and especially in Underdispersion - when the model shows a too-narrow range while reality is much wider
>Why This Works So Well on Short Horizons
On tomorrow and day-after-tomorrow markets, chaos hasn’t fully kicked in yet, so:
• Ensembles frequently underestimate real uncertainty (underdispersion)
• The market sees a “tight” forecast and heavily overprices central buckets
• Tail buckets (extremes) end up ridiculously cheap
This is a repeatable mispricing that happens almost every single day
> How to Exploit Underdispersion in Practice
1. Look at raw ensemble spread
GEFS (31 members) + ECMWF ENS (51 members) are your main sources
2. Compare the width of the distribution
• If ensemble spread is only 3–4°C but historically in this synoptic situation it should be 6–8°C → strong underdispersion signal
• When the model is “too confident” - tails are almost always underpriced by the market
3. Simple entry rule
High underdispersion + tail buckets trading below 12–14 cents = aggressive buy
Central buckets are usually overpriced in these moments
> Real example (NYC, max temp for day after tomorrow):
• ECMWF mean = 23°C, spread only 3.8°C
• Historical spread in this setup ~7°C
• Market pricing the >27°C bucket at 7 cents
Tail was heavily undervalued. These setups deliver excellent edge
> Mini-formula for your bot
dispersion_ratio = historical_typical_spread / ensemble_spread
if dispersion_ratio > 1.6 and tail_price < 0.13:
edge = high # enter
You can layer NGR (Non-homogeneous Gaussian Regression) on top - it quickly corrects underdispersion and makes probabilities much more honest
> When This Edge is Strongest
• Transition days (fronts, air mass changes)
• Cities with complex local effects (NYC, LA, Hong Kong, Cape Town)
• Day-after-tomorrow markets - where spread adds the most value
This approach barely depends on latency. You can even enter several hours after a new run and still keep the edge
Underdispersion + proper calibration is one of the few strategies that still works consistently in 2026, even after most latency edges have died
Save this post - you’ll want to come back to this black box strategy
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A Anthropic liberou um workshop de 26 minutos ensinando como fazer prompts pro Claude de verdade.
Saber escrever prompts é o que separa quem usa IA de quem aproveita IA de verdade.
Quem fez o vídeo:
o time que construiu o Claude.
Legendei em português. Aproveitem.
@0xaporia this indicator has nuances, and definitely is not as simple as "buy the fear, sell the greed"
fun fact: in lower timeframes (30 or 90 day) the historical returns of buying extreme greed are BETTER than buying extreme fear
chart: 30 days BTC returns (y axis) vs F&G (x axis)