OHLC

FreeValueStandardPro

Fetch intraday OHLC bars for an index.

• Aggregated OHLC bars that use SIP rules for each bar.
• Time timestamp of the bar represents the opening time of the bar. For a trade to be part of the bar: bar timestamp <= trade time < bar timestamp + interval.
• Exchanges typically generate a price report every second for popular indices like SPX.

SPX · 20250303 · 20250306

Client

Auth

Style

symbolstring*

start_datedate*

end_datedate*

intervalstring

start_timestring

end_timestring

from thetadatadx import Client

client = Client.from_env()

rows = client.market_data.index_history_ohlc(
    "SPX", "20250303", "20250306",
    interval="1m",
)
for t in rows:
    print(t.date, t.open, t.high, t.low, t.close)

Sample response · JSON

[
  {
    "close": 5728.56,
    "count": 0,
    "high": 5731.27,
    "low": 5725.15,
    "open": 5725.15,
    "timestamp": "2024-11-04T09:30:00",
    "volume": 0,
    "vwap": 0
  },
  {
    "close": 5725.42,
    "count": 0,
    "high": 5730.4,
    "low": 5724.53,
    "open": 5728.9,
    "timestamp": "2024-11-04T09:31:00",
    "volume": 0,
    "vwap": 0
  },
  {
    "close": 5726.54,
    "count": 0,
    "high": 5729.2,
    "low": 5723.55,
    "open": 5725.48,
    "timestamp": "2024-11-04T09:32:00",
    "volume": 0,
    "vwap": 0
  }
]

Parameters

Name	Type	Required	Default	Description
symbol	string	yes	—	Ticker symbol (e.g. AAPL)
start_date	date	yes	—	Start date YYYYMMDD
end_date	date	yes	—	End date YYYYMMDD
interval	string	no	1s	Interval preset. Defaults to 1s when omitted — matching the upstream ThetaData Python library. Accepted values: tick, 10ms, 100ms, 500ms, 1s, 5s, 10s, 15s, 30s, 1m, 5m, 10m, 15m, 30m, 1h.
start_time	string	no	09:30:00	Start time filter
end_time	string	no	16:00:00	End time filter
timeout_ms	int	no	—	Per-request deadline in milliseconds. 0 means no deadline.

Response

Rows of OhlcTick:

Field	Type	Description
ms_of_day	i32	Opening time of the bar, milliseconds since midnight ET.
open	f64	Opening trade price.
high	f64	Highest traded price.
low	f64	Lowest traded price.
close	f64	Closing traded price.
volume	i64	Number of contracts or shares traded.
count	i64	Number of trades.
vwap	f64	Volume-weighted average price of the session.
date	i32	Trading date as a YYYYMMDD integer.