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tedchou12 / webull

Unofficial APIs for Webull.
MIT License
602 stars 185 forks source link

any luck with accurate rsi calculation #202

Closed jamesavilla closed 3 years ago

jamesavilla commented 3 years ago

@tedchou12 Hi, have you been able to accurately calculate rsi to match what webull is showing on their UI. I cant seem to get the same values as they are showing on the rsi14 chart.

tedchou12 commented 3 years ago

Hi!

Actually, I don't use that many indices myself. Can you take a screenshot on http://app.webull.com/ and let me know which part you are referring to?

jamesavilla commented 3 years ago

Screen Shot 2021-03-08 at 11 47 23 AM At the bottom of the screen is the RSI chart @tedchou12

jamesavilla commented 3 years ago

Hi Ted,

Any luck with this?

Thanks, Jim On Mar 8, 2021, 11:36 AM -0500, Ted notifications@github.com, wrote:

Hi! Actually, I don't use that many indices myself. Can you take a screenshot on http://app.webull.com/ and let me know which part you are referring to? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

zenhorace commented 3 years ago

we can't know for sure how webull calculates on their RSI on the backend, but it should be the standard way. See this reference or this article to ensure you're following the standard way

tedchou12 commented 3 years ago

@jamesavilla I took a look at the browser requests. This data is not a GET or POST request. My best guess is that it is using stream or socket technologies to update the information automatically.

My honest opinion is try to think of the purpose of this package as to automate your trading, placing buy or sell orders for you. I don't recommend trying to take advantage of the APIs to fetch realtime or instant data from Webull, because this API is not official nor guaranteed. If your account gets flagged or blocked as a result of accessing the requests too often as a result of using this API, I will not be very surprised. As Robinhood seems to be actively doing that.

There are plentiful of data providers online like Yahoo finance or IEXCloud, and if you are confident in strategy to work, spending few dozen dollars per month on the data is not at all extravagant. And if you really want quality data, I don't recommend Webull too.

If you are paying Webull for Plan 2 data, well you are entitled to that data. But again, Webull does not provide API, so if you are paying for the data, why not go ahead and pay to the data providers who already support providing you the data via API?

Overall, for what you are doing, I recommend you to think again.

tedchou12 commented 3 years ago

^ Sorry, if you are just wondering about the RSI value, I have not a clue. (hfacey's answer is great).

(This is just for people who are looking to access the data on webull.)

mirkan1 commented 3 years ago

we can't know for sure how webull calculates on their RSI on the backend, but it should be the standard way. See this reference or this article to ensure you're following the standard way

it's like gibberish to me

zenhorace commented 3 years ago

we can't know for sure how webull calculates on their RSI on the backend, but it should be the standard way. See this reference or this article to ensure you're following the standard way

it's like gibberish to me

if you're gonna be a trader (an algo trader at that), you'll want to learn technical indicators... what they are, how they work, etc.

mirkan1 commented 3 years ago

Maybe you can write an example script on Python language with a little variables so that I can understand. My math is really bad to understand such equations

we can't know for sure how webull calculates on their RSI on the backend, but it should be the standard way. See this reference or this article to ensure you're following the standard way

it's like gibberish to me

if you're gonna be a trader (an algo trader at that), you'll want to learn technical indicators... what they are, how they work, etc.

zenhorace commented 3 years ago

I don't think I could code anything that's simpler than that the this article. but if you really want to see how someone implements RSI in python here's an example. Also, technical analysis is beyond the purview of this library. You can use a technical indicator/analysis library like the one I referenced above to perform all the common calculations you'd like