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int64
A
942,883,200
27.245216
29.9398
23.951839
26.347023
62,546,380
A
942,969,600
25.710803
25.748229
23.839567
24.17639
15,234,146
A
943,228,800
24.737762
26.347027
23.989267
26.347027
6,577,870
A
943,315,200
25.448834
26.12248
23.951843
23.951843
5,975,611
A
943,401,600
24.026697
25.112015
23.951846
24.588068
4,843,231
A
943,574,400
24.475794
24.850042
24.400945
24.662918
1,729,466
A
943,833,600
24.651744
25.516058
24.388691
25.328163
4,074,751
A
943,920,000
25.253012
25.816695
24.614172
25.365749
4,310,034
A
944,006,400
25.312438
26.062436
25.124938
25.762436
2,957,329
A
944,092,800
26.305216
27.056796
25.967006
26.530689
3,069,868
A
944,179,200
26.96243
27.412429
26.587431
26.69993
3,041,629
A
944,438,400
27.149927
27.862423
27.112425
27.449926
2,250,780
A
944,524,800
27.394924
27.544622
26.534154
27.095526
2,215,970
A
944,611,200
27.09553
27.320076
26.833557
27.058104
1,887,859
A
944,697,600
27.095527
27.5072
27.095527
27.432348
2,029,057
A
944,784,000
27.357495
27.507196
26.796124
26.796124
1,664,738
A
945,043,200
27.245222
27.694322
26.571577
27.245222
4,020,508
A
945,129,600
27.224926
27.224926
25.237432
25.799931
2,328,928
A
945,216,000
25.149437
25.336562
24.550643
24.962315
2,917,766
A
945,302,400
25.149441
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25.149441
28.293121
2,583,923
A
945,388,800
27.769163
28.21826
27.207792
27.507191
3,708,055
A
945,648,000
27.694331
28.106002
27.619479
28.068579
1,196,828
A
945,734,400
27.956291
27.956291
27.544618
27.918865
2,259,448
A
945,820,800
27.918872
28.480244
27.731748
28.480244
1,905,754
A
945,907,200
28.44282
29.939811
28.405394
29.79011
2,159,491
A
946,252,800
29.902382
31.848469
29.677832
31.623922
2,029,616
A
946,339,200
32.618464
36.977615
32.43057
36.977615
3,560,007
A
946,425,600
37.724149
47.34231
37.686726
43.113316
10,518,552
A
946,512,000
45.508507
47.90369
44.460613
47.454594
6,671,116
A
946,598,400
47.604292
47.866265
45.658202
46.294422
1,931,197
A
946,857,600
47.155191
47.267466
40.343885
43.113319
4,674,353
A
946,944,000
40.792988
41.242088
38.772052
39.819946
4,765,083
A
947,030,400
39.670241
39.819942
36.114892
37.349907
5,758,642
A
947,116,800
36.900806
37.125356
34.805018
35.927761
2,534,434
A
947,203,200
35.366393
39.483117
35.32897
38.921745
2,819,626
A
947,462,400
41.316944
41.691192
40.456174
41.279518
2,148,446
A
947,548,800
41.279515
41.279515
39.782524
40.718143
1,855,985
A
947,635,200
40.718119
40.718119
38.36036
39.894775
1,429,874
A
947,721,600
40.94268
41.80345
39.520539
40.493584
1,134,337
A
947,808,000
40.11934
41.541478
40.11934
40.942684
1,316,916
A
948,153,600
41.092397
43.637282
40.792999
42.813938
2,101,753
A
948,240,000
43.113321
43.113321
41.803454
41.915726
2,624,885
A
948,326,400
42.364819
42.439671
40.418733
40.79298
2,007,947
A
948,412,800
41.39179
41.541488
39.782524
41.16724
1,918,336
A
948,672,000
41.017532
43.001045
40.718134
41.017532
2,095,882
A
948,758,400
41.167226
41.691175
39.782511
40.531006
1,153,769
A
948,844,800
40.680704
41.466622
40.643278
40.905251
1,022,357
A
948,931,200
41.840873
42.21512
40.269033
40.980103
868,577
A
949,017,600
41.61634
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40.381322
40.755569
1,609,238
A
949,276,800
40.456176
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38.772061
39.632832
1,040,392
A
949,363,200
39.670247
43.113328
39.670247
42.51453
1,404,291
A
949,449,600
43.038462
45.807896
42.851338
45.807896
1,945,177
A
949,536,000
45.021991
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46.556408
1,779,514
A
949,622,400
46.556388
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44.909697
45.658192
1,145,661
A
949,881,600
46.518978
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47.604298
1,274,277
A
949,968,000
48.352784
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47.304893
1,169,707
A
950,054,400
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45.321384
45.358807
1,182,848
A
950,140,800
46.107274
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45.096803
45.920147
1,066,814
A
950,227,200
45.807916
45.99504
44.797445
45.13427
751,705
A
950,486,400
45.059393
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44.797417
45.770462
837,682
A
950,572,800
45.845327
49.700078
45.845327
49.026432
2,017,594
A
950,659,200
47.903697
49.02644
47.52945
48.502495
1,801,742
A
950,745,600
48.502492
58.083229
46.481552
58.083229
944,908
A
950,832,000
52.993446
57.409567
52.731473
56.137127
4,060,072
A
951,177,600
57.484439
58.307787
53.891667
54.78986
2,227,993
A
951,264,000
54.97487
60.299861
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59.399864
1,690,042
A
951,350,400
60.702963
69.123534
60.179017
63.921494
2,956,351
A
951,436,800
61.900551
68.225334
61.825699
64.744827
2,048,210
A
951,696,000
64.744814
65.381037
58.831706
60.478394
1,675,363
A
951,782,400
60.740376
63.996332
60.665523
62.19994
958,049
A
951,868,800
62.574197
66.91547
62.424499
65.343628
1,037,875
A
951,955,200
65.830168
65.867588
61.376622
63.05138
1,188,300
A
952,041,600
62.836141
66.915437
62.836141
64.669952
1,215,841
A
952,300,800
67.663974
97.004989
67.364572
95.208603
5,693,495
A
952,387,200
93.412198
96.406179
78.442294
85.029053
7,710,809
A
952,473,600
87.424243
91.017021
83.831464
91.017021
3,953,963
A
952,560,000
88.023028
92.214604
86.825434
91.615807
2,514,583
A
952,646,400
91.61582
92.738563
83.831465
85.02906
2,479,353
A
952,905,600
77.880918
83.195237
77.544097
78.591988
2,626,702
A
952,992,000
79.639852
81.436237
71.181859
72.678848
3,522,960
A
953,078,400
76.874795
76.874795
67.94982
68.54982
3,046,242
A
953,164,800
69.460353
73.651928
67.065169
70.695374
2,769,578
A
953,251,200
71.443851
76.047093
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72.529167
1,563,803
A
953,510,400
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67.663959
68.113052
1,420,648
A
953,596,800
66.316654
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2,528,283
A
953,683,200
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71.518684
1,967,965
A
953,769,600
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74.101029
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71.668419
1,951,888
A
953,856,000
71.10702
72.454312
69.610029
71.855515
1,230,520
A
954,115,200
70.77021
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67.776229
68.412453
846,769
A
954,201,600
68.262755
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71.331581
1,392,548
A
954,288,000
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67.065155
1,250,371
A
954,374,400
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62.873604
2,034,230
A
954,460,800
63.472392
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53.891658
62.274803
3,732,940
A
954,720,000
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58.682003
2,030,875
A
954,806,400
58.682012
61.301744
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55.987427
3,519,884
A
954,892,800
55.53834
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53.966498
58.045795
2,109,163
A
954,979,200
58.906574
62.8736
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1,375,073
A
955,065,600
64.370584
74.849517
64.108614
73.053131
2,975,224
A
955,324,800
73.053133
73.053133
63.098145
64.146042
2,956,071
A
955,411,200
60.478422
62.79876
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1,896,107
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Preliminary Financial Time Series Dataset (Version 2)

⚠️ Warning: This is a second preliminary dataset for development, testing, and feedback purposes. A stable, production-ready dataset will be released later. This time, all data in here will be available in future "stable" datasets (I guesss.. )

Overview

This dataset contains parquet files with time series data for various financial instruments, collected using an improved and more stable version of our data pipeline. It builds upon the first preliminary dataset, with a refined structure and more reliable data fetching processes. The data is sourced from publicly available sources like Yahoo Finance via the yfinance library.

Each financial instrument includes:

  • Daily candles: Covering multiple years of historical data.
  • Hourly candles: Covering at least 2 years.
  • Minute candles: Covering a shorter, recent period with high granularity.

This multi-resolution format supports models that analyze both long-term trends and short-term patterns.

Purpose

This second preliminary dataset is designed to:

  • Provide early access to reliable financial time series data.
  • Enable testing and iteration of machine learning models for trading.
  • Gather feedback to finalize a stable dataset format.
  • Test the consistency of the data update pipeline over a few days.

Data Structure

The dataset is organized into a clear directory structure:

  • /data/{category}/{symbol}/{symbol}.days.valid.parquet: Daily OHLC data.
  • /data/{category}/{symbol}/{symbol}.hours.valid.parquet: Hourly OHLC data.
  • /data/{category}/{symbol}/{symbol}.minutes.valid.parquet: Minute OHLC data.

Only files marked as .valid.parquet are included in this dataset to ensure data quality and consistency. Temporary files (e.g., fetch, test, ufetch, utest, failXX, ufailXX) are excluded via .gitignore.

Expected Changes

While the pipeline is more stable, this dataset remains preliminary. Potential changes include:

  • Adjustments to file naming conventions.
  • Reorganization into sharded folders (e.g., by year or month).
  • Refinements to dataset split logic.

A stable, production-ready dataset will be released separately to ensure long-term consistency.

Goals

The Traders-Lab datasets aim to grow in two dimensions:

  • More stocks: Additional symbols will be added over time, with rapid expansion expected soon.
  • More data: Short-term datasets (hourly and minute candles) will grow as more data is accumulated. While continuity of current minute data is not guaranteed yet, future updates will ensure a continuous time history.

Non-Goals

The dataset is designed to be sufficiently up-to-date for training purposes, with data typically no more than a few days old. Real-time updates are not a goal.

License & Usage

This dataset is not licensed under a standard open data license. See the LICENSE file for detailed usage permissions. It is intended solely for research and educational purposes. Redistribution may be restricted; please respect the terms of the original data providers, such as Yahoo Finance.

Accessing the Dataset

The dataset is hosted on Hugging Face under the Traders-Lab organization. To clone the dataset:

# Ensure git-lfs is installed (https://git-lfs.com)
git lfs install
git clone https://huggingface.co/datasets/Traders-Lab/preliminary-v2

Metadata

Dataset metadata is provided in the dataset_card.yml file, following Hugging Face's dataset card standards.

Feedback

We welcome feedback to improve the dataset! Please share your thoughts via the Hugging Face Discussions or contact the Traders-Lab team.

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