
Arena Blog
Data-driven insights on trading strategies, backtests, and market analysis.
We Just Shipped an API That Charges $0.01 Per Call — In USDC, On-Chain, No Account
Phase 4 is live: the same Bitcoin cycle data, on-chain indicators, and aggregated strategy insights now reachable through three channels — REST, MCP, and x402 pay-per-call in USDC on Base. No account required for the third. An AI agent gets HTTP 402, signs a USDC authorization, retries, and has the data three seconds later. What's actually live, why we built it this way, and the Coinbase detour that cost us a day.
We're Opening Our API: REST + MCP + (soon) x402
For 18 months we've been quietly building Backtesting Arena — a platform where 500+ users have run 10,000+ backtests across Bitcoin, stocks, ETFs, commodities, and forex. Daily cycle scores, on-chain indicators, sentiment dashboards, strategy insights. All powered by the same data layer that's been running on a private quasi-API.
AI Agents and Crypto Payments: Where This Is Really Heading
This is the crypto-rail deep-dive companion to our earlier piece [AI and the Future of Payment Systems](https://tradingstrategies.work/blog/ai-future-of-payment-systems-2026), which covered the broader fintech picture including Visa Intelligent Commerce and Mastercard Agent Pay. Here we zoom in on what's happening on the crypto layer specifically.
SpaceX IPO: Buy the Hype or Wait? What the Biggest IPOs Did in Their First 6 Months
Tomorrow, SpaceX is expected to do something no company has done before: raise roughly $75 billion in a single offering.
The Invisible Settlement Layer: Bitcoin, Stablecoins, and the Kill Switch
The most consequential Bitcoin payments story of the past year isn't a price chart. It's a transaction you'll never see.
Nobody Sees the Future — Why No AI Trading Tool Can Beat the Market
LLMs don't trade profitably. But why would anyone expect them to? The honest answer is uncomfortable: nobody can see the future, and markets are explicitly the opposite of a forecasting machine — they're a mechanism for the ongoing negotiation of disagreement. On the Grossman-Stiglitz paradox, why one side of every trade is convinced it's smarter than the other, and why AI trading tools mathematically neutralize themselves the moment they become widespread.
MACD Cross is live — two modes from one classic
A new strategy is live: Gerald Appel's MACD from the 1970s, now fully tunable (default 12/26/9). Two trade modes — classic signal cross or histogram flip — give you a reactive and a confirming variant from one indicator.
Bollinger Bands + RSI is live — the strict mean-reversion play
A new strategy is live: BB+RSI combines two classics into a strict mean-reversion setup. BUY only when price is at the lower Bollinger band AND RSI is oversold — two conditions, fewer false signals. Pro+.
EMA Cross is live — the configurable cousin of Golden Cross
A new strategy is live: two configurable EMAs cross — BUY on the upward cross, SELL on the downward cross. Default 9/21, faster and more tunable than Golden Cross. Plus optional volume- or price-confirmation filter to fight whipsaws.
New strategy: Take-Profit / Re-Entry — lock in gains, buy the dip
The Take-Profit / Re-Entry strategy combines two simple rules: sell when your target gain is reached, re-enter when price drops enough from the post-sell high. No indicator noise — just price and two parameters.
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