GoBaby Coin Scorer & 4-Coin Rebalancer

A quant-driven selector for grid-style swing trading.
Ranks USD pairs on Coinbase by volatility, liquidity, and short-term trend.

Outputs

• scores.csv — full universe with metrics
• skipped.csv — failed or illiquid coins
• recommendations.csv — top 4 rebalance picks

No API key required. Uses public Coinbase endpoints.

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🚀 Quick Start

macOS (Apple Silicon)

Install prerequisites
brew install asdf coreutils git openssl@3 ca-certificates

Enable asdf
echo '. "$(brew --prefix asdf)/libexec/asdf.sh"' >> ~/.zshrc
exec zsh

Install Ruby
asdf plugin add ruby https://github.com/asdf-vm/asdf-ruby.git
asdf install ruby 3.2.4
asdf set ruby 3.2.4
ruby -v

Project setup
git clone gobaby cd gobaby bundle install

Run
ruby gobaby.rb --input coins.txt

Example output:
=== REBALANCE PICKS (4) ===
NOICE-USD hyper-vol score=46.6 vol30d=29.4 range=39.8 trend7d=0.0 vol24h=$2.6M
USELESS-USD hyper-vol score=21.7 vol30d=11.9 range=19.7 trend7d=1.4 vol24h=$14.3M
ALICE-USD mid-vol score=13.7 vol30d=8.6 range=9.5 trend7d=2.9 vol24h=$2.5M
SQD-USD hyper-vol score=13.6 vol30d=13.9 range=15.2 trend7d=18.3 vol24h=$10.3M

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🪙 coins.txt

Example file:

core

BTC-USD
ETH-USD

alts

ALICE-USD
SUI-USD
NOICE-USD
USELESS-USD

Lines starting with # are ignored.

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⚙️ How It Works

Data sources
• Coinbase /products for USD markets
• /products/{id}/candles for daily OHLCV (60 days)
• /products/{id}/stats for 24 h volume and price

Metrics

• realized_vol_30d_pct = standard deviation of 30 day returns ×100
• avg_daily_range_pct = mean (high-low)/close ×100
• trend_7d_abs_pct = absolute 7 day price change
• vol24h_usd = 24 h USD volume

Score formula
score = vol30d + 0.35 × avg_range + 0.5 × log10(vol24h_usd) – 0.5 × trend7d

Categories

• hyper-vol ≥ 12 % vol or ≥ 18 % range
• mid-vol 6–12 % vol or 8–18 % range
• high-liquidity ≥ $10 M 24 h volume
• excluded > 40 % 7 day trend (breakout)

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🧠 Usage

Standard run: ruby score_gbt_universe.rb --input coins.txt
Limit coins: ruby score_gbt_universe.rb --input coins.txt --max 50
Verbose: LOG_LEVEL=debug ruby score_gbt_universe.rb --input coins.txt

Outputs

• scores.csv — all scored coins
• recommendations.csv — rebalance set
• skipped.csv — unlisted / failed

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⏱️ Automate Runs

Daily cron example:
15 7 * * * cd /path/to/gbt-scorer && LOG_LEVEL=info ruby score_gbt_universe.rb --input coins.txt >> run.log 2>&1

Weekly rebalance rules:
• Replace coins if score drops > 50 %
• trend > 30 %
• 24 h volume < $1 M

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🧩 Constants (in script)

DAYS_BACK = 60
WEIGHT_VOL = 1.0
WEIGHT_RANGE = 0.35
WEIGHT_LIQ = 0.50
WEIGHT_TREND = 0.50
HYPER_VOL_MIN = 12.0
HYPER_RANGE_MIN = 18.0
HIGH_LIQ_USD_MIN = 10_000_000.0
MAX_TREND_ABS_PCT = 40.0

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⚖️ Safety

Public data only (no API keys).
Retries + throttling built in.
Strict JSON parsing.
No writes outside project folder.

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🗓️ Weekly Rebalance Routine — GoBabyTrade + gobaby.rb

This guide outlines your weekly trading rhythm using the gobaby.rb script to score coins, select top performers, and manage your GoBabyTrade trader setup efficiently.

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⚙️ Overview

You’ll rebalance your active coins once per week.
Each week, the script re-evaluates volatility, liquidity, and trend data to suggest the top 4 coins to trade.

The goal is to:

• Stay aligned with the most active, profitable market conditions
• Avoid over-trading
• Let open positions close naturally through the trader’s profit logic

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📅 Weekly Schedule

Day	Task	Description
Sunday (Rebalance Day)	Run the script	Run ruby gobaby.rb and review recommendations.csv for the week’s top 4 coins.
	Compare vs current active coins	Identify any coins you are currently trading that aren’t in the new top 4.
	Adjust trader configuration	Use Option 1 (default) or Option 3 (faster exit) to offboard old coins.
Monday–Saturday	Monitor trader performance	Let the trader automatically buy/sell; optionally check open lots midweek.
End of week (Saturday night)	Review progress	Note profits realized and remaining open lots; prepare for next rebalance.

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🧩 Step-by-Step Each Sunday

1. Run the Scoring Script

Run this command from your project folder: ruby gobaby.rb

The script will:

• Fetch 30 days of price and volume data from Coinbase
• Compute volatility, range, and trend metrics for each coin
• Rank and score all coins, saving three output files:
  • scores.csv — full list of ranked coins
  • skipped.csv — coins that couldn’t be scored
  • recommendations.csv — your 4 best picks for the next week

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2. Identify Coin Changes

Compare your current trader coins with the new top 4:

• Coins in both lists → keep trading
• Coins dropped from the top 4 → prepare to phase out
• Coins new in the top 4 → enable them in GoBabyTrade

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3. Offboard Old Coins

You have three main strategies depending on how aggressively you want to rotate.

🟩 Option 1 — Smooth Transition (Recommended)

Let open lots sell naturally but stop adding new ones.

Steps:

1. Go to Menu → Select Currencies
2. Uncheck Add for that coin (leave Sell checked)
3. Click Spread Funds Equally
4. Click Save All Settings

✅ Pros: Keeps profit-taking logic intact.
⚠️ Cons: Takes longer to exit positions.

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🟨 Option 3 — Accelerated Exit (Faster Rotation)

Lower your profit target so existing lots close sooner.

Steps:

1. Go to Menu → Edit Strategy
2. Find Profit Goal (Per Trade)
3. Temporarily reduce (e.g., from 5% → 2%)
4. Click Save All Settings

✅ Pros: Speeds up liquidation while staying within system logic.
⚠️ Cons: May cap upside if coins rebound quickly.

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🟥 Option 2 — Manual Close (Emergency Only)

Force-sell all or some open lots immediately.

Steps:

1. Go to Menu → My Trader
2. Locate the coin and click Close to sell all, or expand (+) to close specific lots.
3. When prompted, check “Stop the trader from purchasing more.”
4. After sell orders complete, return to Select Currencies → Spread Funds Equally → Save All Settings.

✅ Pros: Frees capital right away.
⚠️ Cons: Bypasses profit logic and may realize losses.

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📈 Example Weekly Cycle

1. Sunday: Run ruby gobaby.rb, rebalance your coins using the top 4 picks.
2. Monday–Friday: Let GoBabyTrade operate autonomously — no manual trades.
3. Saturday: Review profits and open positions. If funds are low, adjust allocations.
4. Sunday (next week): Repeat — run the script, update your coins, rebalance again.

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💡 Tips

• Always keep at least one high-liquidity coin in rotation (e.g., SOL, BTC, ETH).
• Avoid switching coins more than once per week — let volatility cycles play out.
• Keep around 10–20% of USDC in reserve to handle new entries or ladder buys.
• Move realized profits back to USDC monthly to maintain compounding stability.

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✅ Summary

Running the script weekly + letting GoBabyTrade manage entries/exits allows:

• Maximum exposure to active market cycles
• Controlled downside via volatility scoring
• Passive compounding without over-managing

This rhythm is designed for a low-time, high-consistency approach — just one rebalance per week.

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🧾 Tracking Your Weekly Progress

Adding a simple weekly tracking routine helps you measure results, refine your strategy, and stay consistent over time.

🎯 Goal

To understand how your GoBabyTrade portfolio performs week over week — how much profit you’re realizing, which coins perform best, and how your volatility-based selections behave in real market cycles.

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🪜 Steps to Track Weekly Results

1. After running ruby gobaby.rb each Sunday:

   • Note the 4 recommended coins from recommendations.csv.
   • Copy the list into your tracking file (see format below).

2. At the end of each week (Saturday):

   • Open GoBabyTrade → My Trader.
   • Record your realized profit for the week.
   • Estimate your average daily gain % (divide weekly gain by 7 and portfolio size).
   • Add any short notes — e.g., “SOL was strongest, SHIB low volume week.”

3. Update your CSV log or sheet:

   • Use the format below in a local file like history.csv or a Google Sheet.
   • Optionally automate appending this data from Ruby (future improvement).

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📘 Example: history.csv

week_start, top_4_picks, total_profit_usd, avg_daily_gain_pct, notes
2025-10-13, "DOGE,SUI,L3,XCN", 312.50, 0.42, "SUI strong trend; DOGE flat."
2025-10-20, "SHIB,SOL,ALGO,XCN", 287.10, 0.37, "Lower volatility this week."
2025-10-27, "SOL,SUI,L3,TRB", 425.75, 0.55, "SOL breakout; strong mid-vol performance."

💡 Tip: Keep history.csv in the same folder as gobaby.rb for easy version control and future automation.

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📊 What to Watch Over Time

Metric	Why It Matters
Weekly profit/loss (realized)	Tracks overall compounding progress
Average daily return %	Shows consistency of your results
Funds tied in open lots	Measures liquidity efficiency
Coin overlap week-to-week	Reveals stability in your selections
Top performers (by name)	Helps identify which coins are “keepers”

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🔍 Review Every Month

At the end of each month:

• Sum the last 4 weeks’ realized profits
• Check if your average daily gain aligns with your expectations (e.g., ~0.4–0.5%)
• Look for coins appearing in multiple top-4 selections — these are statistically resilient picks
• Use your notes to tune parameters or decide when to adjust your grid size or profit goal

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✅ Outcome

By tracking weekly, you’ll:

• Quantify real returns instead of guessing
• Spot early signs of underperformance
• Build confidence in your data-driven rebalancing
• Create a permanent performance log you can use to refine your model

📜 License

MIT License — use at your own risk.
Crypto trading involves substantial risk.