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Full Market Feed versus Internet Feed
Full market broadcast feeds and Internet feeds are two types of real-time market data services.
First let's look at some of the advantages and disadvantages of a full market data feed.
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Advantages
Monitor over 20,000 symbols
Instant access to entire market breadth
Market level feed
Ability to scan every symbol in real-time
Not affected by Internet or ISP outages
All data can be captured
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Disadvantages
Cannot query for historical data
Solar activity and heavy rain can cause outages
50-500 ms delay versus Internet feeds
Satellite dish and receiver required
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Receiving a full market data feed requires significant bandwidth or channel capacity.
Several megabits per second (MBPS) is typically needed.
A satellite feed can provide the bandwidth required to deliver
full markets in real-time.
Alternatives to satellite delivered full market data feeds are services
delivered over high-speed T1 or T3 dedicated land line circuits.
These services are typically much more expensive and require additional monthly
circuit fees and equipment.
DTN RealTime is the lowest cost full market data feed available today.
Now let's look at some of the advantages and disadvantages of an Internet feed.
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Advantages
Can be slightly faster than a satellite feed
Lowest cost, but data is limited
Can query for historical data
Limited local storage of data required
No additional equipment required
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Disadvantages
Usually limited to 500 symbols or less
Symbol level feed
Cannot scan market locally
Internet or ISP outages cause feed outage
Can require high-speed Internet connection
No way to capture full market data
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Building high performance trading systems for profit is a challenging task. Real time market data can be an
essential element in these systems. Depending on your system requirements, you may
benefit from a full market data feed, an Internet feed or both.
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