This looks like a bug to me. Does it do it on the daily? Next time I'd monitor that as well. It's possible that the bug resides in their use of OHLC on a not completed DAILY bar which is then rolled up into a weekly bar (but the OHLC calc had already been done prior to the rollup). After the session is closed or chart reloaded is everything correct?
I doubt it is anything besides a corrupted run file from IB. Were it a data issue, the prices would be changing along with the color. Were it a broader software issue (as per, a bad TWS release), the problem would be broadcast. I'd give a dollar that if you delete/reload TWS, that there is a measurable difference in the size of TWS run files. MY BET: there is a small corruption in TWS that swaps the sign of the difference between the front candle open and current box. This corruption causes the rest of the logic to leave the candle unchanged, while causing the candle inputs to switch from positive to negative to positive again -- resulting in the candle to switch from green to red, without changing the shape of the candle itself. MY GUESS is that a reload of TWS would cure it. US$1.00 or a pint. Your choice.
Thanks guys. I don't know if restarting TWS would have fixed this. This is the first time I see anything like this. Haven't seen it on a daily chart. Thanks for the support.
This is total voodoo and not how software bugs manifest themselves. Reinstalling TWS accomplishes nothing here.
I saw several times very similar scenarios of colour fleshing. Just unsure whether the same issue. My guess is that would happen the same way on daily charts, but only when you touch the bar with mouse cursor. Then the cursor would cause the bar constantly updating data with an ongoing mode. The bar's colour then would change whenever the price data changes (from 29.24 to 29.19 while the open price of the week/bar was in between at say 29.21.).
%% Two ways, or more for it to do that + still be accurate, Aliens2. [1] Some measure by yesterdays close,+ last weeks close, to close price[ friday to friday.[2] Also some charts measure,on daily or weekly charts, from open price, to close, open monday to close friday USa. Dont know how they do it Bulgaria?? Wisdom is profitable to direct i like write down data+ noted on a [printed]chart that measures green ,open price to up to close price; prefer close price to close price, weekly or daily.[which means on a weekly chart my preference is last weeks close to this weeks close, friday to friday, that way it gets to lag more]. You Understand ????? Good question??
At what time were you looking at these charts? During regular trading hours, or during extended trading hours? There is a setting in TWS to show or not show data outside of regular trading hours. If set to "not show" the bars are only based on trading which took place within regular hours, even though during after-market the price could have changed. For example: on Friday afternoon the price dropped to a level below the open on Monday morning, thus the bar colours red. Then, during Friday's after-hours the price climbs up again to above the open of the week, but the bar keeps its red colour. I'm not sure if this applies to the instrument you show, but it is something to be aware about.