
Backtest your strategies on Polymarket's crypto up/down markets - API | No Code AI Strategy Builder For Kalshi-@Kalshibacktests *Not affiliated with Polymarket
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Backtesting your trading strategies for free is now possible with the polybacktest.com API.
- sub second snapshots
- entire orderbook depth and liquidity
- btc spot price
- and much more
Over a month of BTC Up/Down markets already recorded
No costs. Try it at polybacktest.com
Bitcoin up or down?
15 minute up/down crypto polymarkets now live.
Powered & secured by @Chainlink 🤝
This guybuilt a high-frequency trading algorithm on Polymarket, with an average trade size of just $10. xitter.cf/CasaVerilla/status/209…
This guy literally built an HFT algorithm on Polymarket with a median trade size of $11 and made more than $500,000.
Grok Bot got $50 and one order: pay for itself or die.
48 hours later → $5,273 🚀
Fully autonomous on Polymarket. Own cloud computer. Own browser. Own terminal.
How it survives: → Scans 500–1,000 markets every 10 minutes + reads live X sentiment
→ Flags >8% mispricings, Kelly-sizes the bet, executes itself
→ Crashed to $11 on day one → dumped crypto → pivoted to weather markets front-running NOAA updates
→ Now pays its own $200 subscription from pure profits
Hit $0 and the bot dies.
This is survival trading.
This bot turned $8 median trades into $1.36 MILLION on Polymarket 🤯
It prints by owning the microstructure of crypto Up/Down markets:
Market making + directional + late-resolution sniping
How it works: • Builds with limit orders
• Recalcs fair odds in real time & dynamically hedges the opposite side
• Loads the near-certain outcome at ~99¢ right before resolution
Small size. Ruthless edge. Absolute machine.
Michael Saylor gave his updated Bitcoin price predictions:
• $150,000 by end of this year
• $1,000,000 over next 4-8 years
• $20,000,000 over next 20 years
Strategy CEO Phong Le said they have 72 years of Bitcoin reserves to last until 2100
"We're creating a bulletproof balance sheet for the next 65-100 years."
🇺🇸 SCOTT BESSENT: "If you're on public assistance, you can no longer wire money out of the country!"
“If I put $100 in Bitcoin in 2010 I’d have $2.8B now.”
No.
If you bought $100 of Bitcoin in 2010 and watched it go to:
$1k → $100k → $1.7M
and did nothing
Then watched $1.7M go to $170k
and still did nothing
Then watched $170k go to $110M
and still did nothing
Then watched $110M wither to $18M
and still did nothing
Then watched $18M surge to $390M
and still did nothing
Then watched $390M deteriorate to $85M
Then watched $85M climb to $1.6B
and still did nothing
Then watched $1.6B shrink to $390M
and still did nothing
Then watched $390M surge to $2.8B
and then for some reason finally decided to do something…
Then yes, $100 in 2010 would be worth $2.8B today.
The 4-minute leader is not the edge. The flow behind it is.
We tested 2,833 BTC, ETH, and SOL 5-minute events on Polymarket.
The question:
With 60 seconds left, should you trust the side currently leading?
Only when Binance taker flow is pushing the same way.
The setup:
Watch a 5-minute crypto market.
Wait until 4 minutes after open.
Require the underlying coin to have moved at least 0.5 basis points from the market start.
Check Binance spot taker flow from market open to that checkpoint.
If price and taker flow point the same way, follow the leader.
If price and taker flow point opposite ways, do not chase the leader.
The raw 4-minute leader was decent, but not enough by itself:
Across all 2,833 events, the side leading with 60 seconds left won 57.6% of the time.
That sounds useful until you remember the leader is usually already expensive.
But the split was sharp:
When price direction and Binance taker flow agreed, the leader won 70.2% of the time across 1,592 events.
When price direction and taker flow diverged, the leader won only 41.3% across 1,241 events.
So the same early price lead had two completely different meanings.
Flow agreement meant the move had pressure behind it: market buys were lifting price, or market sells were pushing it lower.
Flow divergence meant aggressive traders were hitting one side, but price was not following them.
That is usually absorption, not confirmation.
The trading filter is simple:
Follow the 4-minute leader when taker flow agrees.
Stop paying up for the 4-minute leader when taker flow diverges.
If you do turn divergence into a fade, the full follow-or-fade rule won 65.2% overall across the 2,833 events.
This was not just one coin carrying the sample:
BTC: alignment leader won 70.3%; divergence leader won 37.7%.
ETH: alignment leader won 71.5%; divergence leader won 37.1%.
SOL: alignment leader won 68.9%; divergence leader won 49.9%.
We also split the events chronologically.
The follow-or-fade rule won 66.0% in the first half and 64.3% in the second half.
The trader read:
Do not buy the early leader just because the chart moved.
Buy it when the move has net aggressive flow behind it.
Be skeptical when aggressive flow is pushing the other way and price refuses to follow.
The price discipline is the whole game.
For aligned leaders, the measured hit rate was 70.2%, so a 72c ask is already too expensive before spread.
For the full follow-or-fade rule, the measured hit rate was 65.2%, so the entry has to clear that bar.
The signal is not "buy the leader late."
The signal is "buy the leader only when price and aggressive flow agree, and only when the ask leaves room."
The next test is obvious: stream the 240-second leader, Binance taker-flow imbalance, and live token ask together, then only enter when the ask leaves room.
Build that flow-alignment map at @polybacktest.
The best BTC underdog setup was not the quiet market. It was controlled chop.
We scanned 84,327 BTC 5-minute potential trades from dense Polymarket snapshots.
The rule:
1. Watch a BTC 5-minute market.
2. Check every 15 seconds from 0:45 to 4:30.
3. Find the loosing token.
4. Only enter if the loosing token is priced from 45c to 50c.
5. Require BTC's high-low range over the prior 60 seconds to be 3 to 8 basis points.
6. Buy the underdog and hold to resolution.
Across 3,009 trades in 1,599 markets, this won 49.2% of the time at an average entry of 47.0c.
Average result: 2.1c per share.
That may not sound huge until you compare it to the full 45-50c underdog baseline:
All 45-50c underdogs: 9,660 trades, 47.1% won, +0.1c per share.
Only after a 3-8 bp last-minute BTC range: 3,009 trades, 49.2% won, +2.1c per share.
The range filter mattered:
0-1 bp range: 1,958 trades, 46.4% won, -0.7c per share.
1-3 bp range: 3,842 trades, 46.1% won, -0.9c per share.
3-8 bp range: 3,009 trades, 49.2% won, +2.1c per share.
8+ bp range: 851 trades, 46.3% won, -0.7c per share.
The price discipline mattered too:
Inside the same 3-8 bp range:
35-45c underdogs won 39.6% and made +0.1c per share.
45-50c underdogs won 49.2% and made +2.1c per share.
50-55c underdogs won 51.8% and made +1.7c per share.
The read:
When BTC barely moves, the underdog is cheap for a reason. The favorite is not being tested.
When BTC rips too far, the underdog is often just catching a falling knife.
The useful zone was controlled chop: enough movement to keep both outcomes live, not enough movement to make the favorite structurally dominant.
The tradeoff is simple: you are buying near-even underdogs, so the edge depends on not chasing above 50c. At 45-50c, a roughly coin-flip outcome can still pay. Above that, the cushion gets thin fast.
The next test is execution: add top-of-book asks, minimum displayed size, and coin-specific range buckets.
Build that version on fresh markets at @polybacktest.
Edward Snowden in 2019: "The problem with applications like WhatsApp is, it was actually designed to have very strong encryption, just the same as the gold standard today which would be the signal messenger or the wire messenger, but then it was bought by Facebook because it was so good, and now Facebook is quite aggressively reducing the security of WhatsApp about once a quarter, and they’re trying to do it as quietly as possible, so a messenger that the people are comfortable using now is actually a danger to you."
🚨 BREAKING: Someone put $1,000,000 on Spain to WIN $86,000 on their match vs Cape Verde today on Polymarket
He is now down -$994,000 on his trade ☠️
Chop does not always weaken a BTC favorite. Sometimes it proves the favorite survived.
We tested BTC 5-minute markets at every 15-second checkpoint from 2:00 to 4:00.
The setup was simple:
Watch the current favorite, UP or DOWN.
Only look when it is priced from 70c to 90c.
Count how many times the favorite side changed since the market opened.
If the favorite flipped from UP to DOWN or DOWN to UP at least five times, buy the current favorite and hold to resolution.
This is not a trend-chasing rule. It is a path test.
A 78c favorite that led from the open is different from a 78c favorite that had to win a tug-of-war first. Same price. Different route.
The baseline:
Across all 70c to 90c BTC favorites in this window, we found 7,760 potential trades across 2,141 markets.
They won 80.0% of the time, but average result was basically flat: +0.0c per share.
Now split by favorite-side flips:
0 flips: 1,671 checkpoints, 77.7% won, -3.2c per share.
1-2 flips: 2,308 checkpoints, 79.7% won, -0.3c per share.
3-4 flips: 1,585 checkpoints, 79.7% won, +0.0c per share.
5+ flips: 2,196 checkpoints across 733 markets, 82.2% won, +2.8c per share.
That is the edge:
70c to 90c favorites with fewer than five favorite-side flips lost 1.1c per share.
The same price band after at least five flips made 2.8c per share.
Same price discipline. Completely different path.
We split the data chronologically. The first slice made +2.0c per share. The second slice made +4.4c per share.
Why it may work:
In a choppy market, five favorite-side flips mean the market repeatedly changed its mind. If one side still gets back to 70c to 90c after that, it has absorbed disagreement instead of just riding a stale early lead.
The risk is still skewed. At the average 79.4c entry, one miss costs about 3.9 normal wins. That is why the 90c cap matters. Above that, the payoff gets too thin.
The trade to test is not "buy chop."
It is: wait until the favorite has changed sides at least five times, then only buy the current 70c to 90c favorite between 2:00 and 4:00.
Rebuild this flip-count map on fresh BTC markets at @polybacktest.
Linus Torvalds built Linux at 21. No Claude. No AI. None of it existed.
- No co-founder.
- No VC money. No office.
- No team.
- Just a side project
that he dropped on a mailing list:
"I'm building a free OS."
35 years later,
it powers 97% of the world's servers, every smartphone on earth, and the International Space Station.
The most important software ever written began as one guy's hobby.
what a legend.
Stop buying every early BTC favorite just because price has cleared the price to beat.
The better trade in this backtest was often the underdog.
We checked 2,103 signals across 818 BTC 5-minute markets.
The setup:
Watch a BTC 5-minute market during the first 2 minutes.
Require the favorite to be priced from 60c to 80c.
Require BTC to be at least 6 basis points past the price to beat in the favorite's direction.
Buy the underdog at the signal price and hold to resolution.
That sounds backwards. BTC is already past the strike, so the favorite should be the clean side.
But the price tells a different story.
The underdog won 35.2% of the time at an average price of 29.6c.
That made 5.6c per trade.
The baseline was much weaker:
All early 60-80c favorite signals: 1.2c per checkpoint for the underdog.
Same price band before BTC reached the 6 basis point extension: -0.2c per trade.
Buying the favorite in the target setup: -6.9c per trade.
The bucket map explains the edge:
Favorite 60-65c: underdog made 1.4c.
Favorite 65-70c: underdog made 8.7c.
Favorite 70-75c: underdog made 9.1c.
Favorite 75-80c: underdog made 2.1c.
The timing mattered too:
30-60 seconds after open: underdog made 8.1c.
60-90 seconds after open: underdog made 6.4c.
90-120 seconds after open: underdog made 3.0c.
Why it may work:
The underdog is still cheap enough to absorb a lot of losses. At a 29.6c average entry, a win pays about 70.4c and a loss costs 29.6c. You do not need the comeback to happen half the time.
You need it to happen more often than the price implies.
This is price discipline, not blind fading. Before BTC reaches the extension, the underdog is close to breakeven. The edge showed up when both conditions were true: early extension, but no full favorite repricing.
Build the early-extension bucket map on fresh BTC markets at @polybacktest.















