Code sample

[sukhsinghin]

Hello Everyone,
I m new to java but 15 years with C#. I started looking into the shared code by motivewave example (sdk) and code shared by @danielputra, @ScottyA and @Spin. Thanks for all the great contribution and great work. I m able to compile and test with MW all shared studies. All the shared studies code is too big to understand. I am looking for very small sample code to do only one thing on chart like drawing a line or a dot on the candle, so I can understand the very basic required code and start building on top that. I try to make the shared code do the same but it start crashing. Can anyone share a small code sample project to kick start.
Thanks for all the help.

 

[Spin]

Hello @sukhsinghin, please send me a PM and we'll get you on your way

 

[Alex2888]

Would be interested as well, if it’s not a secret ?

BR
Alex

 

[Spin]

It is not a secret, @Alex2888

It is just far easier to have the code that does not compile on your end loaded into my IDE.
I can then easily check what's wrong.


My PM-inbox is also open for you

 

[sukhsinghin]

Would be interested as well, if it’s not a secret ?

BR
Alex

I m am creating some small sample(bare bones ) and will share here.

 

[Alex2888]

Sounds great gentlemen.

Thanks Spin for these offer ?

To be honest I didn’t code anything in MW up to now… I can code in MQL but I want to go in the near future with MW-SDK.
I tried a few times to get started already but it felt like sukhsinghins Explanation.

Any recommendations for books or other knowledge sources what is helpful to get started?

BR
Alex

 

[sukhsinghin]

Here is bare bone code to dispaly "Hi" on everybar based on close. Thanks to all for sharing the code, used some the shared ref.
package extensions.Suk;
import java.awt.Color;
import java.awt.Font;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.LinkedList;
import java.util.List;

import com.motivewave.platform.sdk.common.Coordinate;
import com.motivewave.platform.sdk.common.DataContext;
import com.motivewave.platform.sdk.common.DataSeries;
import com.motivewave.platform.sdk.common.Defaults;
import com.motivewave.platform.sdk.common.Enums;
import com.motivewave.platform.sdk.common.FontInfo;
import com.motivewave.platform.sdk.common.Inputs;
import com.motivewave.platform.sdk.common.MarkerInfo;
import com.motivewave.platform.sdk.common.Settings;
import com.motivewave.platform.sdk.common.Util;
import com.motivewave.platform.sdk.common.desc.BooleanDescriptor;
import com.motivewave.platform.sdk.common.desc.EnabledDependency;
import com.motivewave.platform.sdk.common.desc.FontDescriptor;
import com.motivewave.platform.sdk.common.desc.InputDescriptor;
import com.motivewave.platform.sdk.common.desc.IntegerDescriptor;
import com.motivewave.platform.sdk.common.desc.MAMethodDescriptor;
import com.motivewave.platform.sdk.common.desc.MarkerDescriptor;
import com.motivewave.platform.sdk.common.desc.SettingGroup;
import com.motivewave.platform.sdk.common.desc.SettingTab;
import com.motivewave.platform.sdk.common.desc.SettingsDescriptor;
import com.motivewave.platform.sdk.draw.Label;
import com.motivewave.platform.sdk.draw.Marker;
import com.motivewave.platform.sdk.study.RuntimeDescriptor;
import com.motivewave.platform.sdk.study.Study;
import com.motivewave.platform.sdk.study.StudyHeader;

@StudyHeader(namespace="extensions.Suk", id="BAR_TEXT", name="BAR_TEXT", label="Bar Text", menu="Suk",
desc="Add text to bar",overlay=true, supportsBarUpdates=false)


public class DisplyText extends Study {

private final static String BAR_FONT = "fontTrendBar";

@Override
public void initialize(final Defaults defaults){
SettingsDescriptor settingsDescriptor = createSD();
SettingTab generalTab = settingsDescriptor.addTab("General");
Font indicatorFont = new Font("Segoe UI Semibold", Font.PLAIN, 8);
Font trendBarFont = new Font("Segoe UI Semibold", Font.PLAIN, 6);

SettingGroup configGroup = generalTab.addGroup("Configuration");
configGroup.addRow(new FontDescriptor(BAR_FONT, "Bar Font", trendBarFont, new Color(250, 250, 250), true, true, false));

}
@Override
public void clearState(){
super.clearState();
}

private boolean showText(final int index, final DataSeries dataSeries,final double L, final double H,final boolean showText,final FontInfo fontInfo,
final boolean showHL) {
if(showText == true) {
Label lbl = new Label("Hi", fontInfo.getFont(), fontInfo.getColor(), fontInfo.getBgColor());
if(showHL) {
lbl.setLocation(dataSeries.getStartTime(index), Math.abs(H));
}else {
lbl.setLocation(dataSeries.getStartTime(index), Math.abs(L));
}
lbl.getText().setShowOutline(false);
lbl.getText().setTextColor(fontInfo.getColor());
lbl.getText().setHAlign(Enums.TextAlign.HCENTER);

addFigure(lbl);
}
return true;
}

@Override
protected void calculate(final int index, final DataContext dataContext){
if(index < 1){
return; //No data
}

DataSeries dataSeries = dataContext.getDataSeries();

if(dataSeries.isBarComplete(index) == false){
return;
}

double openPrice = dataSeries.getDouble(index, Enums.BarInput.OPEN);
double closePrice = dataSeries.getDouble(index, Enums.BarInput.CLOSE);
double highPrice = dataSeries.getDouble(index, Enums.BarInput.HIGH);
double lowPrice = dataSeries.getDouble(index, Enums.BarInput.LOW);

double barBodySize = Math.abs(openPrice - closePrice);
double barSize = highPrice - lowPrice;
double halfBarSize = barSize * 0.5;
boolean isLargeBarIndicated = false;
boolean isCloseHL = false;


Settings settings = getSettings();
FontInfo trendBarFontInfo = settings.getFont(BAR_FONT);
if(closePrice > openPrice)
{
isCloseHL = true;
showText(index, dataSeries,lowPrice,highPrice,true,trendBarFontInfo,isCloseHL);
}
else
{
showText(index, dataSeries,lowPrice,highPrice,true,trendBarFontInfo,isCloseHL);
}
}
}

 

[Spin]

Looks great @sukhsinghin !! Well done You seem to be on the right path.

The most useful aides I often use are these:

MW SDK Programming guide

MW SDK Java Docs

Furthermore I also use the 'find in files'-function of my IDE extensively (because most code you need to write has been written before, no ? )

 

[sukhsinghin]

Looks great @sukhsinghin !! Well done You seem to be on the right path.

The most useful aides I often use are these:

MW SDK Programming guide

MW SDK Java Docs

Furthermore I also use the 'find in files'-function of my IDE extensively (because most code you need to write has been written before, no ? )

that's correct @Spin.
looking for sample code function for going back 5 or 10 candle and getting the OHLC of each. I m able to create arraylist going forward. must be some function like dataseries -1 ..-n.
Appreciate if anyone can share or I will share back in next few days once I am able to do it

 

[Spin]

A small hint perhaps, so your brain doesn't fry:

Getiing a value (Open, High, Low, Close, volume, ...) works like this:

float close = series.getClose(index);

And getting these Values for past bars would work like this:

float close = series.getClose(index-5);

You could obviously iterate over them with a for ... loop:

for(int i = 0; i < 5; i++) {
    float Value = series.getClose(index - i);
    debug ("close of bar index - " + i + " = " + Value);
}

(The debug statements go to the 'Study Log'-window. Menu > View > Display > Study log)

 

[sukhsinghin]

A small hint perhaps, so your brain doesn't fry:

Getiing a value (Open, High, Low, Close, volume, ...) works like this:

float close = series.getClose(index);

And getting these Values for past bars would work like this:

float close = series.getClose(index-5);

You could obviously iterate over them with a for ... loop:

for(int i = 0; i < 5; i++) {
    float Value = series.getClose(index - i);
    debug ("close of bar index - " + i + " = " + Value);
}

(The debug statements go to the 'Study Log'-window. Menu > View > Display > Study log)

Thanks @Spin , perfect and I m cooking and will not let it fry

 

[orishaspollo]

How can we shot the ROC % on each bar when I hover over if?
I see Close, Open, High, Low

 

[Spin]

I don't think that can be done without custom coding, @orishaspollo.

You could program a Study do calculate the ROC for each bar, and then have the value show up in the 'Cursor Data Window'

 

[orishaspollo]

But the code that was posted before said “hi” on top of every bar
I just need the ROC% somewhere m, maybe when I hover in every candle

 

[Spin]

Well, to 'just show the ROC%' somewhere, it needs to be calculated first (since it is not a value like Open or Close, that is being pushed in the datastream of your broker / data-provider)

And when it's calculated you would need code to make it show up on a candle when you hover over that candle (because MW does not do that automatically -as a sidenote I will admit that adding the 'Cursor data Window' or the 'Cursor Data' might be sufficient)

So, @orishaspollo, I am afraid I will have to repeat this requires custom coding

 

[orishaspollo]

Okay but after custom coding to calculate how would you display it when you hover it with the mouse over the candle?

 

[Spin]

Easiest thing would be to export the value, so it shows up in the 'Cursor Data Window' (e.g.: 'Range' in the screenshot above)
I do not believe MW SDK has a possibility to add data to a 'mouseOver' or a 'Hover' on a candle.

 

[orishaspollo]

Okay thanks I’ll give it a try that’s exactly where I wanted to put it