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Working for me now, in US. For both retail and paper accounts.

It must be IB then, I'm using TWS API with my own custom software. Strange they'd activate such a "feature" remotely, maybe it's a bug. Thanks for confirming this...I thought I was going crazy, and just stopped short of reinstalling the OS :-/

Is anyone else seeing this? Just started today for me. As soon as an API connection is made to IB TWS, the TWS UI becomes disabled and unresponsive to keyboard/mouse input. I find this "feature" rather annoying because it's nice to be able to execute discretionary trades along with the...

Thanks,

Standard error = 2.94/sqrt(20000) = 0.02 Looks pretty good as breakeven is 5 standard errors away. How often does your system trigger? If you get 20000 trades over 10 years, you probably won't have the patience to trade it. But if that's over 3 months, that's pretty nice.

Thanks for the encouragement, Jerry. I can certainly see such returns to be possible, though the capacity for such systems would be fairly low, correct? Strong market inefficiencies must be small/niche/limited in scope... Data mining has a bad name among traders. So you must have some...

Thanks very much, I'll look into that.

Hi Jerry, Thanks for chiming in, you have a lot more experience than I do here. My idea is pretty simple. Given a set of trades, I try to predict the profit for each trade using a set of input values such as market cap of the stock, liquidity, etc. The predicted profit is a linear...

Hmm, that's my feeling so far too that my trade picking model isn't adding significantly to the system. I looked up Niederhoffer's rule-of-thumb too. Though it's surprising the formula isn't correlation * sqrt (sample size) similar to the formula for the standard error.

Hi, In an effort to pick better trades, I setup an optimization for the estimated profit for each trade. Over a few thousand trades in my backtest, the correlation between model profit vs actual profit is 0.18, applying the model forward in time, the correlation is 0.14. So the good thing...

Also, MB charges too much interest when you buy stocks on margin.

*sigh*, this is still a problem. I don't want the hassle of asking for a refund all the time (last time it took a month of back and forth). Just going to use IB as primary broker.

I see. So the problem is with those websites which show pre-market activity as the opening price. Thank you guys for checking...

This morning I had a time-triggered (9:21AM) BOO order on NYSE for COT. The trade price returned by IB is 14.70, 3% above the opening price quoted by NYSE at 14.21. I called IB about this, and was told the actual open price is 14.70, even though Yahoo, NYSE, Bloomberg all say COT opened today...

I have a lot of programming skills, but only a little profit, not enough to pay for very expensive tools. Maybe we've similar situations, so you can use some of these ideas. For intraday data I pay for yahoo's $10/month service, and use a linux server to do my scans. For order execution I...

Check out this thread: http://www.elitetrader.com/vb/showthread.php?s=&threadid=36083

The article indicates that people tend to over estimate the volatility of the underlying. However, it doesn't take into account the premiums paid for the expiring options, nor the gains made on the exercised options. So it's like a trader claiming he had a 75% win percentage, but you won't...

The way I see it, people making money contribute to the efficiency of the markets, people losing money pay the winners to keep it up. So yes, we all serve a purpose :)

Haha, Maverick, now that's an open invitation for us ET vultures to pick your brain! I'll bite :) What you said doesn't make sense. If your first trade has zero expectancy, but by adjusting it (with a trade in the underlying or another options trade to form a combo) you gain positive...

MacroEvent, At the time of London's bombing, the reason you shortened the chain of long buy orders and shifted down the short cover orders, is it to adjust the long/short ratio to match a new projected range? By thinning out the long/short-cover orders you reduce overall long orders so if...