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Historical data of what? Stocks, options, futures, forex, others? For how far back? 1 year, 1 month, 1 day? What timefrace? Tick, minute, hour, eod?

And BTW, Google is way more efficient that ET for those types of questions....

No, there isn't. Short positions are reported twice a month by the firms. Meaning that the numbers are updated only twice per month.

Shorting TLSA...(very trendy topic at the moment).

If someone is selling, it means that someone else is buying. Unless the pic you attached doesn't represent the tape (time & sales). And btw, usually, green means 'Buy' and red means 'Sell'.

'Selling down'???? The trades highlighted were done on the offer side, meaning up-tick. That's why they are showing green.

Trading is not about being right or wrong, or knowing if you're right or wrong. Trading is about making money. You can make money if you're right, and you can make money if you're wrong (with the right money/risk management). The goal of trading is to make money, not to be right. On the other...

Flooding in Montreal?????????

250 ms if for the market data update through TWS. DigitalNomad was referring to tick data only available through the IB API. But, I'm a bit skeptical about the 500 ms difference between IQFeed and IB Data, IQFeed being slower according to his claim. I'm using both, but I've never analyzed the...

Your trade cost you $37800, not $380, if you traded 70 contracts.

???? Don't you need to go through your broker to access the CME anyway? Unless you're a broker, you could be sitting directly next to the CME servers, it wouldn't make any difference.

If you can repeat why you are taking a decision, then it can be automated. If you cannot, think harder, unless you change your mind depending on your mood, and even in that case, if you can identify your mood...

How about the Bilateral Symmetry Theorem? Or the Dihybrid Cross Theory? Or the Karyotype Law of Large Samples?

Anything can be automated. If you really cannot automated it, it means that you cannot reproduce it with clear instructions.

You don't know how good (or bad!) a system (or edge) before trying it (for real!), in different market conditions. Start trading 'your edge' with real money, and in a year or so, you'll be able to answer your question.

Option Exchanges read the market feed from Opra (consolidated feed of all exchanges).

I completely agree. Laptop and Cell phone with 4G/LTE is the best backup solution. Today, Laptops are as powerful as Desktops.

How about trading your system live for a year to build a proven track record and then (if profitable!!!) do what you want to do now? I know you said you don't have much money, but still....

That's a joke, right?

The stock was halted due to the LULD mechanism. Check NASDAQ website for more info.