array variables availability in ProRealTime – examples and discussions

Nicolas · Thu, 06 Feb 2020 09:17:13 +0000

The variable arrays will arrive soon in ProRealTime, they will be available in the coming weeks in version 11, with other instructions which I will detail in this topic. I consider this to be a major addition to the ProBuilder language and a radical change in the way we program and for this reason, I think that a topic in the forum is much more suitable for offering examples and discuss. Do not hesitate to ask your questions if things do not seem clear to you at first, I will try to answer as best I can. I will add concrete examples to this topic for future reference. As soon as these new features are deployed in public, you can also come here to offer your examples and your questions in the event of necessary debugging concerning variable arrays. There are so many new possibilities now, that I have been testing for 2 weeks and apart from a few small concerns that have been brought up and corrected since, I must say that I was impressed by the quality and precision of the new instructions offered, thank you IT-Finance and ProRealTime, the year 2020 will be an amazing year for coders! 🙂 In the introduction, I would like to recall what array variable is and why it is so important to be able to use it in programming. An array is a special variable, which can hold more than one value at a time. If you have a list of values (a list of recent highest high, for example), storing them in single variables could look like this: [crayon-623885b3dc175542427415/] However, what if you want to loop through the highest high and find a specific one? And what if you had not 3 highest high to store, but 300? The solution is to create an array! An array can hold many values under a single name, and you can access the values by referring to an index number. In ProBuilder, variables array are declared with $ sign before their names, so following our previous example, our 3 variables could now be stored like this: [crayon-623885b3dc17d281882982/] Note that an array always begin at 0. This is how you should represent how the values are stored in an array: Each index represent a column of the table where you put a value that you will be able to access anytime and anywhere in your code. An index which hasn’t received any value yet is equal to 0. More dynamically, we could store values in an array like this: [crayon-623885b3dc17f486571073/] In this example, each time a new highest high is detected, we store its new value into a new column of the array. By using the instruction lastset(), we retrieve the last known column of the array, so by adding 1 to this number, we add dynamically a new column in order to store a new value. Don’t worry about the size of the array, it can handle 1 million index! Easy! Ready for our first example? See below.

This topic has 201 replies, 44 voices, and was last updated 1 month ago by Aragorna.

Tagged: array, arraymax, arraymin, drawpoint, isset, lastset

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12/26/2022 at 10:48 AM #206317

thomas2004ch

Hi Nicolas,

I use your example1 to the TSLA chart. But it seems a very important resistance/support zone could not be found?

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12/26/2022 at 10:50 AM #206319

Nicolas

That code are using tops and bottoms aligned, not accumulation of prices in the same zone.

Nicolas
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12/26/2022 at 1:53 PM #206323

thomas2004ch

Hi Nicolas,

I use the example4 on the SPY. But it looks quite different than your example screen.

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12/26/2022 at 1:55 PM #206325

Nicolas

Because you are applying it on the daily chart. Pivot points change everyday and that’s what you observed as a curve on a daily chart.

Nicolas
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12/26/2022 at 2:02 PM #206326

thomas2004ch

I apply your example5 on SPY but see nothing.

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12/26/2022 at 2:11 PM #206328

Nicolas

Do not add it on the price, but like an oscillator indicator.

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04/26/2023 at 2:44 PM #213774

Aragorna

Hi Nicolas, I know it’s an old topic but I’m struggling to understand the use of Array. If I put in this indicator Timeframe (1 day, Updateonclose) at the beginning of the code Example #1: support and resistance example, based on fractals points, is it possible to see the rectangles of that timeframe on my chart timeframe 5 minutes? I ask you this because if I do that, I don’t see anything, probably I’m missing something. Second question, If I want to see the condition if price close in TF 5 minutes for example in the middle of a $Topy(y) – $Topy(y) detected in TF 1 day, do I have to do a cycle For, to look for the array and then code a Buy if that condition is Ok? It’s not clear for me, it’d be of great help if you could help me.

thank’s in advance

Alessio

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