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CDROM Data Packages | Custom Order Packages | Quality Guarantee | Zeros in Data | Frequently Asked Questions | Equity Intraday - TimeStamps | Support Requests
Order totals under $999 USD
All CDROM packages have a 3 calendar day (including holidays) inspection policy. Any customer finding more than 6% errors will be issued a refund per the Refund Policy. Customers
must document the errors they have found before any refund will be given without exception. Product returns must be sent to the address listed above and be postmarked before the end
of the 1 day period. Your one day inspection period begins when the products are delivered via Federal Express. All returns must have some type of tracking ability. Examples are certified mail,
registered mail, UPS, FEDEX, DHL, Airborne Express, or delivery confirmation via US Postal Service. If you return data without a tracking number your return policy is null and void. No credit will
be given without a tracking number. Once we receive your product return we will credit your account with the original billed amount minus a 15% re-stocking fee within 7 business days.
Order totals over $1,000 USD
Your order will be shipped via FEDEX. We may use a portable hard drive for delivery instead of CDROMs as the amount of data could be cumbersome for CDs. Once shipped this product cannot be
returned for any reason. Sample files are located on the website for inspection prior to ordering.
Since all custom orders are prepared on a case by case basis, there are no returns, except for faulty merchandise. Faulty merchandise is where the price data delivered to you does not
meet the quality guarantee as set forth below. We bill custom orders on a per symbol or contract basis. If there is a problem with a symbol we will refund the amount for that symbol only, not
the entire data package. A problem with one symbol or contract does not entitle the customer to a refund for the entire data purchase, only the contract or symbol that is faulty. All custom orders
must sign and return a custom order form via fax or email. No work on your order will begin until a signed customer order form has been received. Send us an email to request more information.
Since our data packages supply so much information, it is possible to have some errors. For example, the Intraday stocks of the S&P 500 CDROM has over 80 million lines of information on it. In most cases our data is 99.5%+ accurate, but there may be occasions where the data contains errors.
Any customer who can find 6% or more errors is entitled to an immediate refund. You must document and be able to prove that the data has 6% or more errors in order to qualify for this refund.
Limitations of Data
Most users of our data are private traders who want to use the data for backtesting purposes. Make yourself aware of the limitations of data when using either intraday futures or intraday stock data. Understanding the way the data is presented will help you use the data more effectively.
Not every stock, futures, or ETF will trade at every minute during the day. Some stocks may trade now and then not trade again for another 5-6 minutes. Other smaller issues many only trade once every few hours or every few days. You may also see gaps in time as some issues will halt trading around earnings announcements or other news items that will affect one issue only. You may see a gap across all issues if the exchange halts trading due to (1) moments of silence (death of a notable figure or Sept 11) (2) or trading curbs being hit. Our data will pick up reporting once trading begins again.
Trade action increases as a company's stock becomes more heavily traded. You may find gaps in time at the beginning of an issues' data only to find those gaps happen less frequently as the issue becomes larger.
These gaps do not mean there is an issue with data quality. We are simply reporting the fluctuations as would be seen in the market in real time.
When you use our data files you will notice a "0" sometimes in a field. At first you might think this is some type of error, actually it is done intentionally. This prevents confusion when the data is used.
Most of our data is bought and used for system testing and development. If there is a period during the day where an issue does not trade the data files will show a "0". Not all stocks trade every minute of every day. Some other data providers will carry the last closing price through the next data set to show a seamless data file. This will actually make your system produce false signals.
Example
(Our data feed)
XYZ Corp
Date, Time, Open, High, Low, Close
4/15/02, 13:05, 52.50, 52.75, 52.00, 52.25
4/15/02, 13:10, 0, 0, 0, 0
4/15/02, 13:15, 0, 0, 0, 0
4/15/02, 13:20, 52.25, 52.25, 52.00 52.00
You can see that from the end of the 13:05 bar to the beginning of the 13:20 bar the issue did not trade.
(Other data suppliers)
Date, Time, Open, High, Low, Close
4/15/02, 13:05, 52.50, 52.75, 52.00, 52.25
4/15/02, 13:10, 52.25, 52.25, 52.25, 52.25
4/15/02, 13:15, 52.25, 52.25, 52.25, 52.25
4/15/02, 13:20, 52.25, 52.25, 52.00 52.00
Over the 13:10 and 13:15 bars the data provider simply inserted the price of the most recent closing bar. If you are using a moving average, or a volatilty stop, or any other indicator that makes values from each bar your signals will not be accurate. A moving average for example will "smooth itself over this period because there is no variance in the closing price of each bar.
It is easier when programming to insert a line into the code that ignores bars that have a "0". For instance Tradestation users can insert some code into their system that looks for the open=0, or high=0, or close=0. If the system sees any of these conditions then it will skip the bar and move to the next one.
Our equity intraday products have data timestamped at the beginning of a trading bar. For instance a one minute file showing a stamp of 09:30 means you have data from 09:30:00 until 09:30:59, an entire minute's worth of data. A five minute file would should 09:30:00 as the first time stamp as well. The data in this bar goes from 09:30:00 until 09:34:59, 5 minutes worth of trading.
Most issues stop trading at 16:00 et. However some ETFs trade beyond 16:00 et. These issues show an ending bar time stamp of 16:14 for a one minute file at 16:10 for a five minute file.
Intraday Data Issues - Opening Price
Another common misconception with data is the difference between the last traded price and the official closing price. The official close is not always the last traded price. In many major stocks and ETFs the official close is calculated by the exchange using an averaging technique of the last two minutes of trading. Most futures markets will use an averaging calculation for the open and the close of the day. A link to the NYSE's rule book is below.
http://www.nyse.com/equities/nysearcaequities/1170329803505.html
Important note: Many smaller issues do not trade every day and will use the last traded price for their official settlement price. This price can be many days old. You will see a close on a daily file – but will see no activity on the intraday file. Even though a settlement price is shown, there was no trade activity for the day or for several days.
Support requests should be emailed to info@grainmarketresearch.com. We requirer requests to the in Excel or Word format. The following columns are required in the document
for supporting documentation:
Complete file name, time segment, date of issue, your notes on problem.
Support Request Example
XYZ_1.txt, 1 minute data, 1/1/2003, Missing bar at 09:30
We will handle each request with care and most requests are handled within 10 days. Our answer will include either a downloadable data patch or
the reason we cannot fix your issue.
However smaller capitilized issues will trade infrequently. Our intraday price data shows actual trades. You will see
prolonged gaps if the stock does not trade for days or even weeks [See Intraday Data Issues - Opening Price for additional information.]
- How accurate is your data? - Our data is 94-96% accurate.
- How do you correct bad ticks? - Our data is screened and compared through several data sources. We are confident that the data provided is the cleanest and most accurate available.
- Can you create different time frames with your data? - Our intraday packages come with several different time frames. Most charting programs allow the user to modify
time frames within the software. Our data is in ASCII format to allow the greatest flexibility when imputing into
software programs. Omega Research's products will allow users to define timeframes with our data.
- Is your end of day stock data split adjusted? - Yes end of day stocks is split adjusted. It provides a smooth price chart for testing.
- Is your intraday stocks data split adjusted? - No, we report the raw feed on intraday data. You see what a trader would see while trading on a particular day.
- Does the "end of day global futures" have the data for all futures months, or just nearby futures? - All contract months.
- Do you include all sessions (day and night sessions)? - Day sessions only
- In your data I see zeros, is this an error or some other technique used? - We use Zeros for a purpose see above for more information.
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