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Re: [amibroker] Re: Larry Williams A/D indicator



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Hi Barry,
I checked L.Williams' formula and it is AD=(close-open)/(high-low)*volume for each day. Now, when adding each day he says: if O=C do nothing, if O=H and C=L subtract volume from cum AD, if O=L and C=H add volume to cum AD.
Please, let me know what you think.
 
John S

----- Original Message ----
From: Barry Scarborough <razzbarry@xxxxxxxxxxxx>
To: amibroker@xxxxxxxxxxxxxxx
Sent: Tuesday, 10 July, 2007 12:31:02 AM
Subject: [amibroker] Re: Larry Williams A/D indicator

I din't have it but the coding of this indicator would not be hard.
This is the formula for it:

To calculate the Williams' Accumulation/ Distribution indicator,
determine:

True Range High (TRH) = Yesterday's close or today's high whichever
is greater

True Range Low (TRL) = Yesterday's close or today's low whichever is
less

The day's accumulation/ distribution is then calculated by comparing
today's closing price to yesterday's closing price.

If today's close is greater than yesterday's close: Today's A/D =
today's close - TRL

If today's close is less than yesterday's close: Today's A/D =
today's close - TRH

If today's close is the same as yesterday's close then the A/D is
zero.

The Williams' Accumulation/ Distribution indicator is a cumulative
total of the daily values:

Williams A/D = Today's A/D + Yesterday's Williams A/D

Thus, the Williams' Accumulation/ Distribution indicator is used to
determine if the Forex market is controlled by buyers (accumulation)
or by sellers (distribution) ; and trading when there is divergence
between price and the A/D indicator.

The Williams A/D indicator recommends buying when prices fall to a
new low, yet the A/D indicator fails to reach a new low. Likewise,
sell when the price makes a new high and the indicator fails to
follow suit.

The code follows:

Barry

// Larry Williams' Accumulation/ Distribution indicator

/*To calculate the Williams' Accumulation/ Distribution indicator,
determine:
True Range High (TRH) = Yesterday's Close OR today's High whichever
is greater
True Range Low (TRL) = Yesterday's Close OR today's Low whichever is
less
The Day's accumulation/ distribution is then calculated by comparing
today's closing price to yesterday's closing price.
if today's Close is greater than yesterday's Close: Today's A/D =
today's Close - TRL
if today's Close is less than yesterday's Close: Today's A/D =
today's Close - TRH
if today's Close is the same as yesterday's Close then the A/D is
zero.
The Williams' Accumulation/ Distribution indicator is a cumulative
total of the daily values:
Williams A/D = Today's A/D + Yesterday's Williams A/D
*/

TRH = IIf(Ref(C, -1) > H, Ref(C, -1), H);
TRL = IIf(Ref(C, -1) < L, Ref(C, -1), L);
ad = IIf(C > Ref(C, -1), C - TRL, IIf(C < Ref(C, -1), C - TRH, 0));
WAD = Cum(ad);
Plot(WAD, "Williams AD", colorBlue);
Plot(ad, "AD daily", colorRed, styleOwnScale | styleNoLine |
styleNoLabel );

AddColumn(ad, "AD");
AddColumn(wad, "WAD");
Buy = Sell = C;
Filter = Buy OR Sell;

"Williams' Accumulation/ Distribution indicator is used to determine
if the Forex market is controlled by buyers (accumulation) OR by
sellers (distribution) . \n\nTrade when there is Divergence between
price AND the A/D indicator.\n\ nThe Williams A/D indicator recommends
buying when prices fall to a new Low, yet the A/D indicator fails to
reach a new Low. \n\nLikewise, Sell when the price makes a new High
AND the indicator fails to follow suit.";

--- In amibroker@xxxxxxxxx ps.com, "johnsyska" <johnsyska@x ..> wrote:
>
> Hi All,
> I need your help. Has anybody coded or could share with me the
Larry
> Williams' Accumulation and Distribution Indicator? I know that
> standard A/D for AB is very simmilar but I would like to experiment
> with the other one. Thank you in advance.
>
> John S
>




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