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Those spikes at noon are caused by the WASDE monthly and the Grain stocks quarterly. Check the calendar view of your link as the day changes. Quarterly stocks are generally on the 30th of March, June...

Thanks a lot Canoe. I will watch all these links to understand how it works. Yes IB reps told to change heap size to 1512, and then 1200...which I found odd since I thought as well it should be a multiple of 512. Whatever...It works perfectly with 1200. I hadn't modified anything by error.

Hello Canoe, Thanks for answering after 5 years...I am running Build 950.2g from May 2015. I guess the file is named StartTWS on this build. There is the same line. But they told me at IB to change the number 768 to 1512, but TWS wouldn't start at all at 1512? What is the problem?

I'm running into the same problems now in 2016. I just watch about 40 charts in the morning and then trade with 18 booktraders open( slow moving ), and TWS gets slower and slower during the day. At the end of it, it takes about 2-5 s to update an order... Now, it is not possible anymore to...

Wow...It seems I chose the wrong time to switch to stocks...:(

Milling wheat dives into the abyss. Chi wheat increased storage rates to 0.00365$ per bu per day on Sep 19. KC wheat is near full carry. The only kinda bullish market is Minneapolis, so the front month spread can be a good short in November before first notice. Seasonality + overall bearish wheat.

Thanks for the read only tip, Jack. I didn't know it was there.;)

OK. After 4 hours and going to bed at 2am yesterday, I was finally able to place an order. I reinstalled the API and surprise , it worked. What is weird is that it is the first thing I did yesterday when I faced the problem...Whatever... Here I have a new problem. I wanted to place an OPG TIF...

I get errors number 321 "server error when validating an API client request" and 337 " The date, time or timezone are invalid"...

Here is what used to work on futures. It doesn't anymore: =myname|ord!'id311?place?BUY_1_YM_FUT_201612_ECBOT_USD_LMT_18198_{}_DAY_{}_{\}_O_0_HelloWorld_1_{}_0_0_0_0_0_0' I think there is a new feature on TWS blocking my orders...

Hello, I used to submit orders everyday with the DDE API, and today after 2 years, I can't even send an order to my sim account...:confused: So apparently the sample spreadsheet has changed. Here is the kind of order command you send...

Cool stuff... https://www.tradingtechnologies.com/blog/2016/09/29/wizards-of-todays-markets-ray-cahnman-part-1/ https://www.tradingtechnologies.com/blog/2016/10/03/wizards-of-todays-markets-ray-cahnman-part-2/

http://af.reuters.com/article/commoditiesNews/idAFEMN4TQLYP

Thanks a lot JBM.

Yes. Thanks. B/A spread is another hidden cost compared to underlyings. For sure. But I am worried about possible entry charges for certain ETFs. Is it possible to incur some other fees than those baked into the price and the usual broker/exchange/financing costs? For example, on ADRs if I am...

Hello, I have started trading some ETFs, and I would like to be sure of one thing. When you day trade ETFs, All you have to worry about is your broker commissions and costs for shorting/trading on margin( which is prohibitive on numerous ETFs by the way ), you never have some acquisition fees...

Thanks for the explanation:)

So what is this NASDAQ level1 subscription anyway? Should I subscribe to get ISLAND quotes? My smart quotes were the IB free ECNs quotes?

Ah OK so my orders were actually in the right place. I checked and in retrospect I shouldn't have been filled anywhere, so it sounds possible. Great.:)

OK. I see. I think I was supposed to subscribe to NASDAQ( Network C UTP) for Level 1. Is that enough or I need one of the NASDAQ Level 2 subscription( Totalview...)?