I have to retract my earlier statement about no further errors. Just re-downloaded the historical data from Sept 06 with Amiquote 1.93.
Still numerous errors. eg ALL.AX on 25/1/07 Open $16.26 Low $16.32 Regards Ian Watts --- In [email protected], "Gerard Carey" <[EMAIL PROTECTED]> wrote: > > Now using Amiquote 1.93, I download Yahoo EOD data on a daily basis, > then on weekends download the previous weeks Historical data hoping > to catch any adjustments. > In downloading last weeks Yahoo! historical data I note that data for > ^AORD and ^AXJO on thurs was downloaded again for Friday when this > market was closed. A quick check showed stocks within these indexes > were not affected in a similar way. > This is not the first time this has happened. > Note that posters on this and other lists often call this data Yahoo! > Histerical. WYPIWYG. > Regds > Gerard > > --- In [email protected], "Ian Watts" <idw456@> wrote: > > > > A word of warning for Yahoo ASX data users. > > > > It seems that a bug crept into their data from late September 2006. > > > > There are numerous instances of the "Open" being lower than > the "Low" > > > > I drew their attention to it in early January and their response > was that > > they source their International historical price and volume data > from > > Hemscott, and that I should contact them directly. I sent the > information > > to them, but have had no reply. However I have not detected any > errors > > since, but the errors still exsist in the historical data - makes > back > > testing difficult... > > > > An example of the error is as follows: > > > > BHP.AX on 6th Dec 2006 > > > > Yahoo ETrade > > O 26.31 26.65 > > H 26.71 26.71 > > L 26.53 26.53 > > C 26.71 26.71 > > > > You can put the following into an indicator to see the extent of > the > > problem. > > > > WrongLow = IIf(O < L, 1, 0); > > PlotShapes(shapeHollowSmallUpTriangle * WrongLow , colorBlack, 0, > L, - > > 40) ; > > > > Needless to say I'm currently trialing Premium Data - no errors > detected. > > > > Regards > > > > > > Ian Watts > > >
