Variable Index Dynamic Average VIDYA

[tarantula3535]

https://tr.tradingview.com/script/64ynXU2e/
can anyone help write this indicator ?
it is a good filter..

[xmatthias]

I guess the following should work:

def VIDYA(dataframe, length=9, select=True):
    """
    Source: https://www.tradingview.com/script/64ynXU2e/
    Author: Tushar Chande
    Pinescript Author: KivancOzbilgic
    
    To achieve the goals, the indicator filters out the market fluctuations (noises) 
    by averaging the price values of the periods, over which it is calculated. 
    In the process, some extra value (weight) is added to the average prices, 
    as it is done during calculations of all weighted indicators, such as EMA , LWMA, and SMMA. 
    But during the VIDIYA indicator's calculation, every period's price 
    receives a weight increment adapted to the current market's volatility .
        
    select: True = CMO, False= StDev as volatility index
    usage:
      dataframe['VIDYA'] = VIDYA(dataframe)
    """
        df = dataframe.copy()
    alpha = 2 / (length + 1)
    df['momm'] = df['close'].diff()
    df['m1'] = np.where(df['momm'] >= 0, df['momm'], 0.0)
    df['m2'] = np.where(df['momm'] >= 0, 0.0, -df['momm'])
    
    df['sm1'] = df['m1'].rolling(length).sum()
    df['sm2'] = df['m2'].rolling(length).sum()
    
    df['chandeMO'] = 100 * (df['sm1'] - df['sm2']) / (df['sm1'] + df['sm2'])
    if select:
        df['k'] = abs(df['chandeMO']) / 100
    else:
        df['k'] = df['close'].rolling(length).std()
    df.fillna(0.0, inplace=True)

    df['VIDYA'] = 0.0
    for i in range(length, len(df)):
        
        df['VIDYA'].iat[i] = alpha * df['k'].iat[i] * df['close'].iat[i] + (1 - alpha * df['k'].iat[i]) * df['VIDYA'].iat[i-1]
    
    return df['VIDYA']

I'm no expert in pinescript though - so please help me validate this so we can add it to technical in the future.

[tarantula3535]

thanks buddy i will try and inform you about it works properly...
I hope you took a look at my other indicator posts..
i checked it and they are working properly
supertrend , MADR , VWMACD , RMI ... and the others.. @xmatthias

[xmatthias]

oh well, you bet (RMI + VWMACD + TKE are in #117) 👍

[tarantula3535]

thenx man i add my indicators file...that is corrrect results...thank you for help....
#117 I hope I could help..

[xmatthias]

Thanks for the feedback, added it to #117 too.

[acemi1]

hi, indicator calculation does not match tradingview.
I found a code that works correctly.
However, I am a beginner in python. I can't give you ready code.

#97 (comment)

[xmatthias]

well the link is for a completely different indicator (OTT) - so i'm not sure how that comment is relevant here.

[acemi1]

Thank you for the answer.
There is no error in the link. Calculating "vidya" in OTT indicator. Written as df['var'] in the code.
I took the relevant part in the code of the OTT indicator and tried to make it usable. The results are the same as with Tradindview.

def vidya (dataframe=df, length = 4, source="close"):

    alpha = 2 / (length + 1)
    df['ud1'] = np.where(df[source] > df[source].shift(1), (df[source] - df[source].shift()), 0)
    df['dd1'] = np.where(df[source] < df[source].shift(1), (df[source].shift() - df[source]), 0)
    df['UD'] = df['ud1'].rolling(9).sum()
    df['DD'] = df['dd1'].rolling(9).sum()
    df['CMO'] = ((df['UD'] - df['DD']) / (df['UD'] + df['DD'])).fillna(0).abs()


    df['Var'] = 0.0
    for i in range(length, len(df)):
        df['Var'].iat[i] = (alpha * df['CMO'].iat[i] * df[source].iat[i]) + (1 - alpha * df['CMO'].iat[i]) * \
                           df['Var'].iat[
                               i - 1]
    # print("vidya indicator\n", df['Var'])
    return df['Var']

vidya ()

vidya.py.txt

[xmatthias]

If you think an indicator is wrong and you have a fix, please open a pull request submitting the fix (please with sample code/screenshots showing missalignment / new alignment with tradingview).

Please understand that i'll not be extracting code from issue comments - which will have me repeat the work you already did (compare it with tradingview, ...).