[isatrader]

I've discovered a problem in the NYSE Bullish Percent ($BPNYA) that stockcharts shows, in that since the beginning of October they have changed how it is calculated to include intraday data, instead of close only data like it had been previously. Which wouldn't be a problem, however the data they are using is opening considerably lower at the beginning of each day and then recovering sharply every time (see attached), and hence I believe it's giving false readings, which is swinging the normally slow moving $BYNYA all over the place the last few weeks.

After speaking to stockcharts support, they suggested switching to use close only data on the P&F chart, which shows that the double top breakout last week didn't happen, and so the $BPNYA is still in a column of Os on Bear Confirmed since 3rd September.

I've urged them to fix the intraday data, so hopefully they'll listen, as we don't want incorrect data on one of the most important breadth charts.

           

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UPDATE: 26/10/13

After further conversations with stockcharts support staff I've managed to convince them that there was a problem with the data, and their programmers have now made some changes to fix the problem, which look like like they took effect on Friday (see attached below). So hopefully the problem is now fixed and you hence there shouldn't be anymore false signals on the high low data chart, but I'm going to continue to use the close only data, as that's what the data has been in the past and only shows the significant changes, which is what I want with this longer term measure.