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Re: [amibroker] Re: Relative Strength vs RSI - AB definition clarification, please?



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Sam,

Not exactly.

At least in AmiBroker's manual:

RSI is always WILDERS RSI
RS is always comparative relative strength (price/base price)

Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message ----- 
From: "samgrayy" <samgrayy@xxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Monday, October 21, 2002 6:16 PM
Subject: [amibroker] Re: Relative Strength vs RSI - AB definition clarification, please?


> You are right .. there are two different things: 
> 
> - Relative Strength is a measure of how a stock is performing in the 
> market. Typically within it's own industry. (Read William O'Neil's 
> books and follow Investors Business Daily). It is refered to as RSI.
> 
> - Weilder's RSI is a measure of the days in a row that a stock has 
> been going up. So it acts as an oversold and overbought 
> indicator since nothing goes up or down forever. 
> 
> So you have to live with the ambiguity of overlapping acronyms. From 
> what I have seen so far, RSI refers to relative strength unless being 
> refered to Weilder's RSI. Of course there are exceptions but that's my 
> personal take.
> 
> Hope that helps,
> Sam Gray
> 
> 
> --- In amibroker@xxxx, "mroman59" <mroman59@xxxx> wrote:
> > According to AB help file, RS by definition is: Calculates relative 
> > strength of currently selected security compared to "tickername" 
> > security, using SYNTAX relstrength( "tickername", fixup = 1) 
> > 
> > AND 
> > 
> > RSI is a technical indicator developed by Welles Wilder to help 
> > investors gauge the current strength of a stock's price relative to 
> > its past performance. It compares a stock's highest highs and lowest 
> > lows over a period of time. RSI is based upon the difference between 
> > the average of the closing price on up days vs. the average closing 
> > price on the down days. 
> > 
> > Problem:
> > 
> > Many investors use a screening method called relative strength to 
> > filter out stocks that have a value between 0 and 100 which is not 
> > considered RSI in my opinion. This filtering is the strength of a 
> > stock price movement over a set period of time which is relative to 
> > the price movement to all other stocks in the database. The 
> > comparison to an index is not the objective, only how well the price 
> > is moving compared to the price movement of other stocks. 
> > 
> > For exmaple: "Filter stocks whose RS is above 85" means screen for 
> > those stocks whose price movement is in the top 15% of all stocks in 
> > the database. Again, this is not RSI, because RSI compares a stock 
> > price to its own past performance and not to that of all stocks. 
> The 
> > code somehow ranks stocks by percentile (0 to 100) and you 
> > automatically know which stocks prices are in the top 10% or 15%, 
> > etc., which ever filter you wish to screen for. The code must 
> include 
> > the ability to take into account the price within a given period of 
> > days, for example 1 month, 3 months or 1 year, etc.
> > 
> > At this time I can not find any instructions in AB that would help 
> me 
> > code and screen for stocks with price movement (or RS) that returns 
> > all stocks with a selected value (between 0 and 100) which is 
> > actually a comparison to all other stocks in the database. I have 
> > used other software applications that performed this function, but 
> > the code was not available to the user.
> > 
> > Your help is appreciated.
> > Thank You
> 
> 
> 
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