Alphameta kline

AlphaMeta Kline

Fetch candlestick / OHLCV data via Interactive Brokers — latest N bars, history by date range, and today's intraday minute curve. Supports 1m to month periods with split/dividend-adjusted pricing.

When to Use

• "NVDA 近一周走势" / "AAPL 1-week chart" — daily bars, 5 trading days
• "TSLA 近一个月" / "1-month chart" — daily bars, 22 trading days
• "TSLA 近一年日 K" / "AAPL 1-year chart" — daily bars, 252 trading days
• "TSLA 5 分钟 K 线 200 根" / "last 200 5m candles" — intraday bars with explicit count
• "AAPL 月 K 线" / "MSFT monthly chart" — monthly bars
• "NVDA 分时图" / "AAPL intraday today" — intraday mode
• "AAPL 2024 年日 K" / "price history Jan-Jun 2024" — history by date range
• "前复权日 K" / "forward adjusted chart" — add adj flag

Workflow

1. Resolve symbol — use standard ticker (NVDA, AAPL, SPY). AlphaMeta handles contract resolution via its position/quote database.

2. Determine mode:

   • Explicit "intraday" or "today" → intraday mode
   • Date-like first argument (YYYY-MM-DD, "today", "yesterday") → history mode
   • Otherwise → latest N candles mode

3. Map time windows — translate natural-language ranges to (period, count). Use trading-day counts (1 year ≈ 252 trading days, 1 month ≈ 22):

   • "1-week" → day, 5
   • "1-month" → day, 22
   • "3-months" → day, 66
   • "6-months" → day, 126
   • "1-year" → day, 252
   • "today / intraday" → intraday mode

4. Execute command via REST API:

   curl -X POST "http://127.0.0.1:18080/api/v1/execute" \
     -H "Content-Type: application/json" \
     -d '{"cmd": "kline <SYMBOL> <ARGS>"}'
   

   Concrete examples:

   # Latest 100 daily bars
   curl ... -d '{"cmd": "kline AAPL day 100"}'
   
   # Last 200 5m candles with split+dividend adjustment
   curl ... -d '{"cmd": "kline NVDA 5m 200 adj"}'
   
   # History by date range (daily)
   curl ... -d '{"cmd": "kline AAPL 2025-01-01 2025-06-30 day"}'
   
   # Today's intraday 1m chart (includes pre/after-market data)
   curl ... -d '{"cmd": "kline NVDA intraday"}'
   

5. Interpret results — summarize the OHLCV data: range high/low, close-to-close net move, volume patterns. Use ▲/▼ for direction. Calculate net move as (last_close - first_close) / first_close. Cite data source as AlphaMeta / Interactive Brokers.

Common Rationalizations

Rationalization	Reality
"day 30 is roughly one month"	30 trading bars ≈ 6 calendar weeks. For one calendar month use day 22
"Net move = (last open − first open) / first open"	Always use close-to-close: (last_close − first_close) / first_close
"I'll pass the raw JSON to the user"	Raw JSON is unreadable. Must translate to prose: range high/low, net change, volume, trend
"Count = calendar days"	Count = number of bars, not days. day 5 = 5 daily bars covering ~7 calendar days
"Intraday works for any past date"	Intraday mode only supports today. For historical minute data use history mode with 1m period
"Count is the exact number of bars returned"	Count is a minimum — for longer periods (week/month) IBKR may return more bars than requested

Red Flags

• Intraday is today-only — calling intraday on a past date returns empty data. For historical minute bars use kline <SYMBOL> <START> <END> 1m
• Data availability varies by instrument — options, some ETFs, and crypto may return empty or very short histories. Verify with quote first
• All modes use useRTH=False (hardcoded) — the backend reqHistoricalDataAsync is called with useRTH=False for all three modes (_kline, _history, _intraday). The command does NOT accept a useRTH flag; any useRTH token in the command string is silently ignored. All results include pre-market and after-hours data. Mention this if the user expects strict trading-session data.
• adj only affects price fields — open/high/low/close are adjusted, volume is not
• History mode may return bars before the start date — IBKR includes the bar containing the start timestamp, which can be one bar earlier than expected. E.g. kline AAPL 2026-05-01 2026-05-07 day may include a bar dated 2026-04-30. Always compute the actual date range from the returned data.

Output

The API returns a JSON envelope. The candlestick data lives in result.bars:

{
  "success": true,
  "request_id": "req-xxx",
  "result": {
    "symbol": "AAPL",
    "period": "day",
    "count": 5,
    "adjust": "none",
    "bars": [
      {
        "date": "2026-05-08",
        "open": 287.86,
        "high": 294.76,
        "low": 287.5,
        "close": 293.86,
        "volume": 39300184,
        "average": 293.118,
        "barCount": 258450
      }
    ]
  },
  "execution_time_ms": 2558
}

Variations by mode:

• history: result has start, end instead of count
• intraday: date is ISO 8601 datetime (e.g. 2026-05-14T09:30:00), no adjust field

Always read from response.result.bars[]. Never pass raw JSON to the user — present results as prose with markdown formatting:

**{Symbol} — {Period} ({N} bars, {date range})**
Range: ${high} ~ ${low}  |  Close-to-close: ${first_close} → ${last_close} ({sign}{X.Y%})
Volume: avg {X} shares/day — {volume pattern note}
Trend: {1-2 sentence summary of price action, key levels, and pattern}

Examples

**NVDA — Daily (5 bars, May 6–12)**
Range: $196.16 ~ $223.75  |  Close-to-close: $207.26 → $219.48 (▲ +5.9%)
Volume: avg 126M shares/day — elevated throughout
Trend: Strong uptrend from $196 support, 5 consecutive green candles with above-average volume.

**NVDA — 1m Intraday (111 bars, May 14)**
Range: $229.36 ~ $233.22  |  Open: $231.34 → Now: $230.26 (▼ -0.5%)
Volume: heavy in first 2 minutes (1.4M shares), then tapered to ~10K/min
Trend: Opened with a spike to $233.22, then gradual selloff through the morning. Intraday low of $229.36 at 09:39, minor bounce to $230.26.

Intraday output should mention the opening spike/drop, session high/low, and whether volume confirms the trend. For multi-day history, highlight the directional bias, key support/resistance levels, and any volume anomalies.

Always attach ▲/▼ direction arrows to net move. Cite source: AlphaMeta / Interactive Brokers.

See the alphameta skill for server setup and command execution syntax.

Key Concepts

Price Adjustment

• Default (TRADES): split-adjusted only
• adj (ADJUSTED_LAST): split + dividend adjusted (flag syntax only — --adjust prefix is NOT supported)

Period Mapping

Period	Aliases	Bar Size
1m	minute	1 minute
5m	—	5 minutes
15m	—	15 minutes
30m	—	30 minutes
1h	hour	1 hour
day	d, 1d	1 day
week	w	1 week
month	m, 1mo	1 month

Data Source

Data is sourced from Interactive Brokers (IBKR) historical data feed. Quality depends on the exchange and contract type. For options, futures, and non-stock instruments, data availability may vary.

Error Handling

On failure the API returns a JSON error object instead of result:

{
  "success": false,
  "error": {
    "code": "COMMAND_ERROR",
    "message": "Symbol not found: INVALID999999"
  }
}

Surface error.message to the user — never silently retry.

Situation	Reply
Service not running (health check fails)	Start the service: alphameta start
error.code == "COMMAND_ERROR"	Surface error.message verbatim. Common messages: Symbol not found, Start must be before end
No data returned for range	Expand the date range or switch to a shorter period
Network / timeout	Retry; if persistent, check IBKR connection via /health

Related Skills

• "What's this stock's current price?" → alphameta-market-data
• "What are the Greeks or technical indicators?" → alphameta-technical
• "What's the option chain for this symbol?" → alphameta-market-data