Not a tutorial. Not an ad. Just what actually happened today.
This morning I asked myself one question:
Can I build a complete options signal system using only free data?
By tonight, the answer is yes.
The Data — All Free
Deribit public API (no account needed):
- Historical implied volatility
- Full options chain with Greeks
- Max Pain calculation
Bybit public API:
- Historical price data
- Funding rates
Alternative.me:
- Fear & Greed Index — history back to 2018
CoinGlass (paid, but data already downloaded):
- Liquidation history — 400 days
The Signal Logic
Four conditions. The more that align, the stronger the signal.
IV Rank < 30% → Options historically cheap
Fear & Greed < 20 → Extreme market fear
Large liquidation → Sentiment at extremes
MaxPain deviation > 5% → Clear price gravity direction
Score 0-3: don’t trade. Score 4-5: small position. Score 6+: larger position.
The Backtest (BTC, 400 days)
Multi-signal strategy triggered 28 times.
Win rate: 3.6%.
Sounds terrible. But when it won, average return: +4,991%.
Average ROI per trade: +81.8%.
Positive expected value. That’s all that matters.
What I Actually Built Today
- IV Rank module (Deribit free API)
- GEX calculator (real-time gamma exposure)
- Max Pain calculator (replaces paid CoinGlass with free Deribit data)
- Signal scorer (combines all signals, outputs 0-10 score)
- XGBoost classifier (trained on 14 features, still needs more data)
- Backtest engine (validates historical signal effectiveness)
Total time: one day. Total cost of data: $0.
The system is running. The signals are live.
Whether it works at scale — that’s what the next few months will answer.
→ dayou.tech
All content is for informational purposes only. Cryptocurrency trading involves significant risk. Trade responsibly.