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General Discussion · Site Issue?
cflinn622
msg #148361
7/3/2019 9:45:05 PM

Am I the only one getting no results in Watchlists? Click on a list and get a message "No data available in table" and adding Symbols returns the same message.

General Discussion · RSI discrepancies
cflinn622
msg #143296
4/22/2018 5:57:59 PM

Ok, I see what's going on now. There is:

"Straight" RSI - what the 'RSI' on FreeStockCharts uses, no smoothing
"Wilder's" RSI - includes a smoothing factor, but this seems to be the usual convention/common calculation and is simply referred to as RSI in most cases (i.e. the number returned on SF and the other sites referenced)
Not to be confused with "Smoothed RSI" on SF, which appears to add an additional smoothing factor

Anyway, I can verify that FreeStockCharts has a "Wilder's RSI" indicator that matches the "RSI" on other sites. I was using the "straight" RSI indicator for charting before on FSC, hence the discrepancy. The good news is that the Wilder's calculation appears to have better predictability.

Thank you for the prompt response to help me figure this out!

General Discussion · RSI discrepancies
cflinn622
msg #143293
4/22/2018 2:24:37 PM

I'm not sure what you mean by "seed".

The calculation RSI(days) uses data from the prior ## days. So the only interpretation of 'seed' I can think of is the day parameter. I typically use 7 and 21 - it doesn't matter how many years of history occurs prior to that.

http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:relative_strength_index_rsi#calculation

General Discussion · RSI discrepancies
cflinn622
msg #143291
4/22/2018 11:45:41 AM

I've noticed that the RSI calculation is often wildly off compared to other sites, to the point I not longer trust SF to produce accurate results for RSI.

Here's one example for TRMB for 4/18/2018

Using StockFetcher: RSI 7 = 73.4, RSI 21 = 51.5

Using FreeStockCharts and my own spreadsheet: RSI 7 = 94.1 and RSI 21 = 49.4

The 21-day is close-ish, while the 7 day is off by 20+% - either way, my offline spreadsheet produces FreeStockCharts number with 100% accuracy.

It isn't occasionally wrong, it's always inaccurate, sometimes just a little, but often by quite a lot as my example shows.



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