runkit | Runkit | REST library
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QUESTION
I have tried to use Technical Indicators library to calculate RSI
(and ROC
) for candlestick's closing prices, but when I compare results from Binance, I am not getting quite accurate results:
I fetch data using this Binance API:
This is example of usage for RSI and ROC indicators:
If I do this:
...ANSWER
Answered 2022-Mar-25 at 21:17( better: When do we get equal outputs on screen ? )
RSI is one of several indicators that include an element of prior data. As such a 14 day RSI based on 15 days or 50 days of underlying data will be significantly different to a 14 day RSI based on 500 days of data.
So, unless all TimeSeries' "observers" compute RSI from (a) the exactly the same TimeSeries and (b) using the very same "length" ( for depth-of-prior DATA dependent underlying computing, here starting with a plain SMA for the very first "observed" period-length bars ) and (c) using the very same numerical properties of computing methods ( having almost all platforms using the same 64-bit IEEE-754 numerical processing, this need not cause problems, using hybrid FPGA/GPGPU/SoC/ASIC algos yet may introduce this class of further incoherencies (causing new breed of differences in results) ),
so,
there is the highest chance to meet both (a) & (b) & (c) if and only if we all start from the very "beginning" of the DATA in the TimeSeries-history ( easy if we all use the same source of data, not so easy, if some use time-zone uncorrected, different history-depths from different (T)OHLC(V)-data sources ) and using the same numerical processing methods.
Some technical-indicators are less susceptible to depth-of-observation, some more ( if this is a core problem ( for sake of shaving latency off / increasing performance / maintaining Quant-models' reproducibility & repeatability of results ),
try to set your "Accuracy" threshold and test all technical-indicators' dependence on the depth-of-prior DATA ( so as the convergence starts to meet your "Accuracy" threshold, making no sense to extend the depth further, if results started to converge and remain stable irrespective of any further extended depth-of-prior DATA re-processing )
In cases, where you happen to reach such "short enough" depth-of-prior DATA, you need not re-process a single bar deeper into past. Not so in all other cases, where DATA-depth dependence cannot be avoided. Pity, there we all need to take the same depth (often the maximum one, see above), if we want to get the same result(s).
QUESTION
I have been trying to install p5.serial server on a mac for 2 days to no avail. I have tried everything I can think of to try and download p5.serialserver on a mac. I used all three methods suggested in the documentation (https://github.com/p5-serial/p5.serialport) which were
clone the repository and run
npm install
This failed when I ran npm install and I was not able to proceed to the next step. Then I tried
...ANSWER
Answered 2022-Feb-15 at 03:16I have finally figured this out after a professor sent resources to explain the error. Basically, you need to download to nodev12.20.2 in order to use p5 serial (probably because of outdated dependencies)
I did this by running the following in the terminal. You can use nvm to run different versions of node, so I suggest using it to install node if you didn't already:
QUESTION
I want use bad-words module with Turkish characters but i cant use. How can i make this?
Sample:
...ANSWER
Answered 2021-Sep-18 at 23:33if the RegEx engine supports Unicode then you can try to match the unicode instead of characters. see here
QUESTION
I am using the jsbn library to manage BigIntegers in a javascript application. It seems that the negate function is not working well.
I expect that the negate function works like the Java one.
...ANSWER
Answered 2021-Jul-07 at 17:09BigInteger is storing numbers in a way that allows them to track numbers bigger than what JavaScript can track. How they do that you should consider a black box - when you are ready to go back to a normal int, you need to do bi.negate().intValue()
, or if it really is too big, bi.negate().toString()
QUESTION
I would like to download some a tampermonkey script that help me download images from a website and then packed as a zip file for me to download. I used JSZip for packing the images.
I have no problem following the sample code but when an image is added, then I would get the following error:
...ANSWER
Answered 2021-Feb-05 at 07:13The root cause of the problem is the downloaded image didn't follow the base64 requirement. There is nothing wrong with the JSZip
part.
Here are different ways to download the image properly:
Node
I managed to replace the image downloading library from request to node-base64-image and everything is working now. I guess you can still use request but need to tune the parameters in order to get that work. Here is the working Runkit. So in conclusion the problem is on download side.
Browser
As I want to download the image from the using a browser script (tampermonkey) so the node solution doesn't fit me. After searching a bit I find a working solution:
QUESTION
I am trying to add my Stack Overflow reputation as a live badge on my GitHub profile README.
First, I would need to somehow get my account information from Stack Overflow using some API. Next, I would need to extract the reputation and then pass it to another API which creates badges in Markdown.
Now, I have done some research and it seems like I am able to use the Stack Exchange API to attain my Stack Overflow account information in JSON format via an endpoint URL. Furthermore, Shield.io's API will allow me to create badges from an endpoint URL which is perfect. However, Shields.io requires the endpoint to be in a specific JSON format.
So now to solve the puzzle, I need a third API which would be able to read and parse the JSON from the Stack Exchange API and then host an endpoint URL in the JSON format needed. RunKit's API seems to be able to do just that.
An example of what I am trying to achieve (but instead of commits it is my Stack Overflow reputation):
...ANSWER
Answered 2020-Aug-12 at 14:40First using stack exchange's user api here, you are able to attain your stack overflow account information in JSON format via an endpoint url. All you have to do is to specify your stack overflow user id in the id field and click run to generate the endpoint path. You can attain your stack overflow user id by clicking on your profile picture, it will then appear in the search bar.
Append the path generated to https://api.stackexchange.com to form the endpoint url.
My stack exchange endpoint url: https://api.stackexchange.com/2.2/users/9133459?order=desc&sort=reputation&site=stackoverflow
Now that we have our stack overflow information in JSON format, we can proceed to parse it and create a new endpoint which meets shields requirements. To do that you would have to create an account with RunKit. Publish this piece of code on RunKit and make sure the node version is v4.9.1 (replace the url in the code with your own endpoint url generated previously):
QUESTION
How do I detect if the current environment which my script runs in is Runkit?
...ANSWER
Answered 2020-Aug-13 at 15:03Runkit defines a lot of environmental variables that are sufficient to detect this. More specifically, we can detect RUNKIT_ENDPOINT_PATH
, RUNKIT_ENDPOINT_URL
, RUNKIT_MOUNT_PATH
and RUNKIT_HOST
:
QUESTION
I have simple vuejs application. In the main.js I have something like:
...ANSWER
Answered 2020-Apr-11 at 22:15All right, so here is the problem, the Access-Control-Expose-Headers
must also be presented in the headers of response to non prefight reqeust. After I exposed this headers to all response, I can get access to the Authorization
header in my vuejs app.
QUESTION
I'm a little titled with a problem with jest
. My tests which test the call of the createLogger function from winston
doesn't trigger.
As I'm exporting the logger
variable which has been filled by the result of createLogger
, I don't understand why my expect
isn't working. Can someone tells me where's the problem?
Thanks :D.
Here's my code:
ANSWER
Answered 2020-Apr-09 at 08:49Can't reproduce it. It works for me.
logger.js
:
QUESTION
var minimist = require("minimist")
const a = minimist(`executable --param "a b"`.split(' '))
console.log(a)
...ANSWER
Answered 2020-Mar-16 at 09:42Based on your example code, the problem is your preparation of the string array which has broken up the string-with-spaces before the parser gets to see it:
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