Jump to content

Welcome to the new Traders Laboratory! Please bear with us as we finish the migration over the next few days. If you find any issues, want to leave feedback, get in touch with us, or offer suggestions please post to the Support forum here.

  • Welcome Guests

    Welcome. You are currently viewing the forum as a guest which does not give you access to all the great features at Traders Laboratory such as interacting with members, access to all forums, downloading attachments, and eligibility to win free giveaways. Registration is fast, simple and absolutely free. Create a FREE Traders Laboratory account here.

Frank

MP Indicator in EL Using Arrays

Recommended Posts

I am trying to understand arrays in programming and would like to learn through practice. I saw the arrays thread but thought I would start a fresh one for this indicator as it may be useful to many. I will try to outline the mechanics of how to do this very specifically. I know how to this in Excel easily so I think I can outline this pretty well -- but I don't know the syntax necessary in Easylanguage. If someone who understands arrays well in EL can help, then I can learn how to do arrays and I would be greatly appreciative.

 

I would like to do an indicator that creates an array for each 30-min bar that places in the array all the prices that were traded during that bar. This can be done by taking the low price of the bar and adding 0.25 (1 tick) for each tick of range in that bar (H - L) / 0.25

 

obviously, this requires a dynamic array as there will be different amounts of items within each bar.

 

then I would like to cross references those arrays in a new cumulative array (all bars since day started) and take that cumulative array and solve for the 'mode' (an easy keyword function in EL) -- mode is the most repeated price. In excel, it defaults such that if there is more than 1 price that occurs the most amount of times, Excel takes the lowest of these prices --- which is fine..... because I would then like to just count the number of times the mode price occured and put that in a histogram.

 

any willing to help out --- if this isn't clear, I can surely make it more clear.

 

thanks

 

Frank

Share this post


Link to post
Share on other sites

Frank,

 

Your use of static arrays is correct. Nice job so far.

 

Here are some suggestions...

 

  • Instead of using a different array for each bar, use a 2-dimensional array. For example, use Array[barNumber, Index], where BarNumber is the number of the bar on each day and Index is each price level per bar.
  • You probably have use for the array in your indicator, but so far, an array is not required. All of the information in your Excel spreadsheet can be derived from the high and low of each bar.
  • Keep in mind that the EL code is executed as each historical bar is processed, so you don't have to process all bars at one time. That is, you don't have to explicitly loop through all bars.

 

Below is the EL code with the suggestions made above. Hope it helps.

 

Array.JPG.ddb1961949bca7fcb063848d3af5e4f0.JPG

Share this post


Link to post
Share on other sites

ok ant and/or anyone else that may be interested in helping -- I looked at this code more closely and now there is a framework I understand.

 

that is cool, you have created an 2-dimensional array with all the 30-min prices indexed within an assigned bar number.

 

so next step would then be to reference the cumulative bars up to that point in the day --- would you use an if/then statement such as:

 

if currentbar = 4 then loop through all the elements within BarNums 1-3 and create a cumulative array from which we loop through that and use a counter such as y=y+1 to count when an element is = to the mode price of the cumulative array?? is that doable?

 

open ecry is slightly different but it did compile with one adjustment (changing 'bars' to 'bars1')

 

one other thing, with current structure, the array can run out of space unless we set a huge number up front. how do you deal with this elegantly?

 

thanks for any help

 

frank

 

attachment.php?attachmentid=13671&stc=1&d=1253759385

5aa70f2b8a571_OverlapCountIndicator.thumb.png.6d3db2c40543c87f8ca6903c099c811e.png

Share this post


Link to post
Share on other sites

so next step would then be to reference the cumulative bars up to that point in the day --- would you use an if/then statement such as:

 

if currentbar = 4 then loop through all the elements within BarNums 1-3 and create a cumulative array from which we loop through that and use a counter such as y=y+1 to count when an element is = to the mode price of the cumulative array?? is that doable?

 

I would do any calculations you need as you process each bar. You shouldn't have to go back to reference previous bars.

 

one other thing, with current structure, the array can run out of space unless we set a huge number up front. how do you deal with this elegantly?

 

Since you're processing bars as you go, you really don't know how many ticks you have in future bars. You could probably figure out the first array subscript (i.e., BarNum), but to keep it simple, just specify the array subscripts as inputs and then define a dynamic array. If you get a run-time error about an array overflow, simply increase the inputs corresponding to the array subscripts to resolve it. Usually, you don't want to make arrays too big because you can take a performance hit, especially for real-time indicators on high volume days, but it doesn't sound like this is a real-time indicator so it probably isn't a big deal. Also, 2-dimensional arrays can get quite large. For example, your array currently holds 14 x 5000 = 70000 elements.

Share this post


Link to post
Share on other sites
You shouldn't have to go back to reference previous bars.

 

having trouble processing this. this calculation doesn't store a resulting number to use in the next bar, don't you have to repeatedly look back at all the cumulative array elements and re-count the mode as it may have changed?

 

funny, maybe I am just a visual person -- but this was really easy for me when I originally did it in Excel but now seems quite compute intensive when thinking about the array coding steps.

Share this post


Link to post
Share on other sites
having trouble processing this. this calculation doesn't store a resulting number to use in the next bar, don't you have to repeatedly look back at all the cumulative array elements and re-count the mode as it may have changed?

 

funny, maybe I am just a visual person -- but this was really easy for me when I originally did it in Excel but now seems quite compute intensive when thinking about the array coding steps.

 

Hey Frank,

 

As I mentioned in one of my posts, I'm not sure why you need to store the bar data in the array since you have the same data in the bar chart (i.e., the high/low of each 30 min bar), but you have the code in case you need it. My guess is that you won't need it based on what I think you're trying to do. You can calculate the mode as you described by revisiting the bars, but your indicator will run very slowly.

 

I think what you need is a basic array that stores the number of TPOs at each price that trades. You can then use an indexing function to get the number of TPOs at a particular price. For example, array cell 1500 can hold the number of TPOs for price 1052, array cell 1501 can then hold the number of TPOs for price 1052.25, so on and so forth.

 

Tams offered you some good advice above. Study the indicator he referenced. It describes exactly how to do this. Instead of storing bid/ask volume in the array, you will be storing TPO count. I would simply adapt that code to fit your needs - why re-invent the wheel?

 

Tams, you da man when it comes to providing coding advice on this forum!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Topics

  • Posts

    • Yes trading can give as freedom but it has relatively high prices if you don't want to study learn from trading mistakes or fall into gambling. Trading success isn't something you can achieve quickly same as in other businesses. 
    • Date : 21st January 2022. Market Update – January 21 – Stocks Sink – Netflix & Peloton Crash. Stock markets sank again (Nasdaq -1.3%) Tech companies led the slide, (Peloton -24%, Netflix -18% post results. USD firmed as Yields & Oil dipped, Gold held onto to gains. Markets are nervous and risk aversion has picked up as investors eye shaky earnings, and waning confidence, with mounting tensions over Ukraine adding to geopolitical tensions. US Weekly claims hit a 3-mth high, EZ Inflation was an ATH and North Korea said it may resume testing its nuclear arsenal. Asian markets and AUD & NZD lower (AUDJPY -0.62%) ASX 200 (-1.2%), Nikkei 225 (-1.8%).   USD (USDIndex 95.65) ticks higher slips as Yields decline . US Yields 10-yr moved closed at 1.83% & trades at 1.785%. Equities – USA500 -50 (-1.1%) 4482 – USA500 FUTS lower again at 4467. USOil – Fell below $82.00 afrom highs at 87.95 on Wednesday, Inventories increased by 0.5m vs 2.3m drawdown. Gold – held on to gains topped at $1848 and holds $1838 now, holding the key 1830 support. Bitcoin under $40,000 back to test $39,000, FX markets – EURUSD back to test 1.1300 – 1.1322, USDJPY now 113.80 & Cable back to 1.3570, the week’s low. Overnight – UK Retail Sales plunged -3.7%, Consumer confidence slipped 4 whole points to -19 and Japanese core inflation was inline at 0.5%. European Open – The 10 US Treasury yield is up from overnight lows, Bunds are also finding buyers in opening trade, and the 10-year continues to shy away from turning positive, as ECB officials continue to push back against speculation of an early rate hike at the end of the year and market sentiment generally turns cautious. DAX and FTSE 100 future are posting losses of -1.4% and -1.1% respectively. Today – EZ Consumer Confidence, BoE’s Mann; ECB’s Lagarde, BoJ’s Kuroda Biggest FX Mover @ (07:30 GMT) EURNZD (+0.66%) Rallied from 1.6675 yesterday to breach 1.6800 now. MAs aligned higher, MACD signal line & histogram higher. RSI 73 OB but still rising, H1 ATR 0.0026 Daily ATR 0.0100. Always trade with strict risk management. Your capital is the single most important aspect of your trading business. Please note that times displayed based on local time zone and are from time of writing this report. Click HERE to access the full HotForex Economic calendar. Want to learn to trade and analyse the markets? Join our webinars and get analysis and trading ideas combined with better understanding on how markets work. Click HERE to register for FREE! Click HERE to READ more Market news. Stuart Cowell Head Market Analyst HotForex Disclaimer: This material is provided as a general marketing communication for information purposes only and does not constitute an independent investment research. Nothing in this communication contains, or should be considered as containing, an investment advice or an investment recommendation or a solicitation for the purpose of buying or selling of any financial instrument. All information provided is gathered from reputable sources and any information containing an indication of past performance is not a guarantee or reliable indicator of future performance. Users acknowledge that any investment in FX and CFDs products is characterized by a certain degree of uncertainty and that any investment of this nature involves a high level of risk for which the users are solely responsible and liable. We assume no liability for any loss arising from any investment made based on the information provided in this communication. This communication must not be reproduced or further distributed without our prior written permission.
    • Best way to make money is forex trading however it still requires a lot of hard work needed to build necessary skills which are required to earn money from forex.
    • I bet he was referring to acquire all the basic necessary skills needed to start earning money from the forex trading.
    • Yes agreed we can do forex trading as part time in the start and when we learn trading we can switch to full time trading.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.