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And could probably implement the testing of a strat, indicator, model about 10x faster than Java using Easy Language or Power Language. Unless you are trading systems with millisecond time-in-trades, today's CPU's can easily keep up with fast market conditions even using scripted languages...

check out.....https://www.quandl.com/data/WIKI?keyword= That is the free version...there are also other purchase options as well.

It would be interesting to see the performance difference between a directional debit spread vs. a long straddle for pre-earnings announcements. Even if you are only right 50% of the time on the direction, would that surpass a long straddle strategy I wonder ?

Good catch.

I voted NO. However, some time in 2016, the Fed will be forced to reverse policy and go to ZIRP once again...and then later to NIRP. That's when the "rip your face off" rallies will occur. Until then, you can short all rallies safely. It appears SPX at 1250 is very possible before this occurs...

This is only important for traders using the API, correct ?

I agree and it was definitely 1 in 1000.

Checking for absolute zero is futile...you need to determine when it changes direction. MyMACD = MACD(Close, FastLength, SlowLength); MyFastAvg = Average(Close, FastLength); If MyFastAvg[1]<MyFastAvg[0] Then Begin GoLong = 1; End; If MyFastAvg[1]>MyFastAvg[0] Then Begin GoShort = 1; End...

That was total B.S. as we all know. Nav spent a ton of money on building and testing that algo. The key was the timing, the layering in the order book, the patterns of reversal orders. It was all well programmed...with the ability to configure it and to override it. THAT'S THE KEY. Nav's may be...

Wow....he was larger than any other player then !! That's the power of having a powerful algo and knowing when and how to use it.

One of the CNBC Fast Money traders, I think it was Dan, went short straddle before the Facebook announcement. That position got hammered.

Agreed, but only backtesting will indicate whether taking a directional approach or a hedged approach is more profitable in the long run.

Of course buying the straddle is another strategy for a situation where there could be an explosive move. Not sure of the profitability of this strategy...would be interesting to see some backtested results. I would guess around a 30-40% win rate at best.

So he's getting only 5 years ? Why did they say Nav could face over 100 years in jail ?

Well, this will be interesting.....have they issued a subpoena for Nav's source code ? If so, I wonder if Nav is going to give them the real code that performed the order layering ? The latter of course would be the most damaging to his case.

Indeed, it's now at the 123 level....the 123 puts got crushed this morning. It's obviously bolstered by the broader market move. However, I think 125 has got to be near a top.

In many cases, you add a layer of coding to detect these situations. However this does increase the complexity of the algo and a different way to handle this is just be sure to monitor your systems in realtime and shut them down when these situations arise with a "close all positions" button.

I don't think so....as spoofing at the time was not really a chargable offense. Of course Nav signed an agreement with the CME not to spoof, so they can ban him and/or fine him. It'll be interesting to see what Federal authorities come up with.

http://www.marketwatch.com/story/navinder-sarao-didnt-cause-the-flash-crash-study-finds-2016-01-27?dist=afterbell Another take on this. Poor Nav is not out of the woods yet.

Finally, they are coming to their senses. Yep, it's likely the problem related to a data feed issue or huge mutual fund liquidations.