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David, thanks.. I'm going to look carefully into it.
In the meantime, I've added and changed a couple of things and - at
least just for the sake of charting, and especially on a weekly chart -
the results are decent.
Thank you again.
percent = Param("Percent move", 1, 0.5, 10, 0.5);
marg = Param("Threshold % Margin", 1, 0, 3, 0.1);
lastTrough1 = Trough(C, percent, 1);
lastPeak1 = Peak(C, percent, 1);
barsSinceTrough1 = TroughBars(C, percent, 1);
barsSincePeak1 = PeakBars(C, percent, 1);
Color[0] = colorLightGrey;
for(i = 1; i < BarCount; i++)
{
if(barsSinceTrough1[i] > barsSincePeak1[i]) // breakdown
{
if(C[i] < (1 - marg/100)*lastTrough1[i])
color[i] = colorRed;
else
color[i] = color[i-1];
}
if(barsSinceTrough1[i] < barsSincePeak1[i]) // breakout
{
if(C[i] > (1 + marg/100)*lastPeak1[i])
color[i] = colorBlue;
else
color[i] = color[i-1];
}
}
Plot(C, Name(), color, styleBar);
dbw451 wrote:
> Oops, I forgot the trend change rule about a new high or low. The up
> trend and down trend variables that I offered just need an additional
> filter to check for new highs and lows:
>
>
>
> bUpTrend = C > dSwingHighValue AND BarsSince(bHH) > BarsSince(bHL) AND
> BarsSince(bLL) >
> BarsSince(bHH) AND BarsSince(bLH) > BarsSince(bHH);
>
> bDnTrend = C < dSwingLowValue AND BarsSince(bLL) > BarsSince(bLH) AND
> BarsSince(bHH) >
> BarsSince(bLL) AND BarsSince(bHL) > BarsSince(bLL);
>
>
>
> Your second problem is a tough issue for which I don?t have a good
> solution. I?ve tried many variations of variable zig percentages using
> ATR multiples, swing lengths, etc. and have not found a good way reduce
> false highs and lows produced in a range. As a trade filter, I?ll look
> at the swing lengths and require the action swings to be a multiple
> (i.e. 1.5x to 2.0x) longer than the reaction swing length. If the
> action and reaction swing length differences are smaller than the
> multiple, I assume the market is ranging. This approach means I don?t
> trigger a trend trade until the 3^rd wave and I miss the trend trade for
> the first wave of a trend change (which is usually the largest). In
> other words, I?ll trade the first pullback of a new trend confirmed by
> swing length differences being larger than my multiple.
>
>
>
> Your code framework looks fine as long as you realize (which I?m sure
> you do) that the Zig indicator (i.e. Peak/Trough) look into the future,
> so values compared against them should not be used in a trading system.
> I?m pretty sure PowerSwings has a lot of logic behind it to determine
> the trend changes. I?ve not figured out a good approach. Writing code
> for the left hand side of the chart is never easy because usually there
> is a lot of visual interpretation that?s tough to codify. I?m open to
> any ideas on this topic. With ideas, I might be able to offer
> suggestions on how to code.
>
>
>
> Regards,
>
>
>
> David
>
> ------------------------------------------------------------------------
>
> *From:* amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] *On
> Behalf Of *jppt0k
> *Sent:* 02/19/2007 12:12 PM
> *To:* amibroker@xxxxxxxxxxxxxxx
> *Subject:* [amibroker] Re: Coloring the chart in accordance with the trend
>
>
>
> Hi David,
>
> thank you very much for your help.
>
> In fact I did see the code posted by Eric Tangen and tried to modify it
> but I've not been able to get what I'm after.
>
> I've tried your modifications too but - unless I did something wrong -
> they don't give exactly the classical trend definition.
>
> I have at least two problems. The first is to define a new trend. It
> should start (an uptrend, for example) when - while being in downtrend -
> it makes a new high and from then on it should keep doing higher highs
> and higher lows.
>
> The second problem is to avoid calling a new trend when the market moves
> sideway but the prices make incosequential highs and lows.
>
> I've not been able to reach any good framework beside the two steps
> below and the definition of the two latest highs and lows with which
> trying to apply the classical rules. I've tried to add other steps but
> it seems I miss the very programming competence to reach any result.
>
> percent = Param("Percent move", 3, 0.5, 10, 0.5);
> lastTrough1 = Trough(L, percent, 1);
> lastTrough2 = Trough(L, percent, 2);
> lastPeak1 = Peak(H, percent, 1);
> lastPeak2 = Peak(H, percent, 2);
> barsSinceTrough1 = TroughBars(L, percent, 1);
> barsSinceTrough2 = TroughBars(L, percent, 2);
> barsSincePeak1 = PeakBars(H, percent, 1);
> barsSincePeak2 = PeakBars(H, percent, 2);
>
> for(i = 1; i < BarCount; i++)
> {
>
> if(barsSinceTrough1[i] > barsSincePeak1[i]) // breakdown
> {
> if(C[i] < lastTrough1[i])
> color[i] = colorRed;
> }
>
> if(barsSinceTrough1[i] < barsSincePeak1[i]) // breakout
> {
> if(C[i] > lastPeak1[i])
> color[i] = colorBlue;
> }
>
> }
>
> Plot(C, Name(), color, styleBar);
>
> --- In amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>,
> "dbw451" <dbw451@xxx> wrote:
>>
>> The Peak and Trough function use the Zig indicator, so the peaks and
> valleys
>> are determined once price moves a predefined amount based on a percentage
>> specified. Eric Tangen posted some nice code that does something similar
>> you want with the caveat the color change does not change until the
> peak or
>> valley is identified and it doesn't look at HHs and LLs:
>>
>>
>>
>> http://www.amibroker.com/library/detail.php?id=353
> <http://www.amibroker.com/library/detail.php?id=353>
>> <http://www.amibroker.com/library/detail.php?id=353&hilite=ZIG
> <http://www.amibroker.com/library/detail.php?id=353&hilite=ZIG>> &hilite=ZIG
>>
>>
>>
>> If you really want HHs and LLs to determine colors, you can use this
> code as
>> your base. The code identifies the peaks and valleys (PivotLow and
>> PivotHigh variables) and where the peaks and troughs are valid (Buy_Valid
>> and Sell_Valid variables) You can use ValueWhen to get the Low and High
>> values at the pivots:
>>
>>
>>
>> dSwingLowValue = ValueWhen(PivotLow, L, 1)
>>
>> dSwingHighValue = ValueWhen(PivotHigh, H, 1)
>>
>>
>>
>> Then you can determine your HHs and LLs:
>>
>>
>>
>> bHH = dSwingHighValue > Ref(dSwingHighValue,-1);
>>
>> bLH = (Ref(dSwingHighValue,-1) > dSwingHighValue) OR (PivotHigh AND
>> dSwingHighValue == Ref(dSwingHighValue,-1));
>>
>> bLL = dSwingLowValue < Ref(dSwingLowValue,-1);
>>
>> bHL = (Ref(dSwingLowValue,-1) < dSwingLowValue) OR (PivotLow AND
>> dSwingLowValue == Ref(dSwingLowValue,-1));
>>
>> .
>>
>> Then you would determine your uptrend / downtrend:
>>
>>
>>
>> bUpTrend = BarsSince(bHH) > BarsSince(bHL) AND BarsSince(bLL) >
>> BarsSince(bHH) AND BarsSince(bLH) > BarsSince(bHH);
>>
>> bDnTrend = BarsSince(bLL) > BarsSince(bLH) AND BarsSince(bHH) >
>> BarsSince(bLL) AND BarsSince(bHL) > BarsSince(bLL);
>>
>>
>>
>> Finally, you would update Tangen's BarColor formula with the up trend and
>> down trend variables:
>>
>>
>>
>> BarColors =
>>
>> IIf(BarsSince(Buy_Valid) < BarsSince(Sell_Valid)
>>
>> AND BarsSince(Buy_Valid)!=0 AND bUpTrend, colorGreen,
>>
>> IIf(BarsSince(Sell_Valid) < BarsSince(Buy_Valid)
>>
>> AND BarsSince(Sell_Valid)!=0 AND bDnTrend, colorRed, colorBlue));
>>
>>
>>
>> This should work, however I personally do not use trend coloring like
> this.
>> I actually prefer Tangen's coloring scheme because when trends are defined
>> by HHs and LLs, too many price bars are in a trend-less mode (blue
> color in
>> this case).
>>
>>
>>
>> Hope this helps.
>>
>>
>>
>> Regards,
>>
>>
>>
>> David
>>
>>
>>
>> _____
>>
>> From: amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>
> [mailto:amibroker@xxxxxxxxxxxxxxx <mailto:amibroker%40yahoogroups.com>]
> On Behalf
>> Of jppt0k
>> Sent: 02/19/2007 10:06 AM
>> To: Amibroker Group
>> Subject: [amibroker] Coloring the chart in accordance with the trend
>>
>>
>>
>> Hi all,
>>
>> I'm trying every way to color a chart in accordance with the usual
>> definition of trend (uptrend with higher highs and higher lows and
>> downtrend with lower lows and lower highs) but cannot come up with
>> anything that works as it should.
>>
>> The idea is to obtain a chart similar to those of PowerSwings, such as
>> the one attached.
>>
>> I'm using the Trough and Peak functions but have reached a degree of
>> convolutedness and confusion that I'm sure to stand now at the
>> I-absolutely-need-help point.
>>
>> Is there someone that has worked on a similar project or knows a way to
>> do it?
>>
>> Thanks in advance.
>>
>> j
>>
>
>
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