docs: Add settings management setup guide

- Document .env permission requirements (chmod 666)
- Explain customizable TP size feature
- Provide example trading strategies
- Security notes for production deployments

SETTINGS_SETUP.md

@@ -0,0 +1,60 @@
+# Settings Management Setup
+
+## Initial Setup
+
+After deploying the trading bot, you need to make the `.env` file writable by the container:
+
+```bash
+chmod 666 /home/icke/traderv4/.env
+```
+
+This allows the web UI to save settings changes directly to the `.env` file.
+
+## Security Note
+
+The `.env` file contains sensitive information (private keys, API keys). The file permissions of `666` (rw-rw-rw-) allow the containerized application to write settings, but the file is still protected by:
+
+1. File system permissions (only accessible on the host)
+2. Docker isolation (container runs as non-root user)
+3. Network isolation (not exposed to internet)
+
+For production environments, consider:
+- Using secrets management (e.g., Docker secrets, Kubernetes secrets)
+- Environment variable injection from secure vaults
+- Read-only .env with separate settings database
+
+## How It Works
+
+1. User edits settings in web UI at http://10.0.0.48:3001/settings
+2. Click "Save Settings" → API writes to `/app/.env` (mounted from host)
+3. Click "Restart Bot" → Watcher restarts container
+4. Container reloads settings from updated .env file
+5. New configuration takes effect
+
+## Take Profit Configuration
+
+You can now customize BOTH the price level AND the position size for each TP:
+
+### TP1 (Take Profit 1)
+- **Price %**: When to trigger the exit (e.g., +0.7% = exit at 0.7% profit)
+- **Size %**: What % of position to close (e.g., 60 = close 60% of position)
+
+### TP2 (Take Profit 2)
+- **Price %**: When to trigger the second exit (e.g., +1.5% = exit at 1.5% profit)
+- **Size %**: What % of REMAINING position to close (e.g., 100 = close rest)
+
+### Example Strategy
+
+**Conservative (70/30 split):**
+- TP1: +0.5% price, 70% size → Lock in most profit early
+- TP2: +2.0% price, 30% size → Let remainder run
+
+**Aggressive (30/70 split):**
+- TP1: +1.0% price, 30% size → Take small profit
+- TP2: +3.0% price, 70% size → Let most position run for bigger gains
+
+**Balanced (50/50 split - default):**
+- TP1: +0.7% price, 50% size
+- TP2: +1.5% price, 50% size
+
+The risk calculator in the web UI will dynamically show expected gains based on your settings.