Congratulations to all the winners!
And perseverance for those who haven't been so lucky this time.

@news-quantiacs so is this going to be the final full list of futures availables for Q15?
Or do you have any other change in mind which could affect to the submissions in the next days?
Thanks in advance
Luis.

Hi mates!

I have a question about the sharpe ratio shown in the global leaderboard...
If we take the value indicated in the main interface for the out of sample, and then try to replicate it by accessing a specific system and filtering its OOS period, the value obtained differs from the one shown In the main interface of the global leaderboard.

Why is this discrepancy generated? And which of the two sharpe ratio values ​​is correct?

Thanks in advance!

Hello everyone,
I'm getting familiar with the Q18 contests and I'm encountering some problems when trying to reproduce systems similar to those already presented in previous editions, specifically I can't pass different parameters for each asset as I did in other contests.
I have tried it in 2 ways, directly through a dictionary:

...and from a json config:

recovering values like this:

I can call this method and then check the stats calling qnstats.calc_stat(), everything is perfect until i try to call de backtest method:

When I obtain this error:

¿Any ideas?

Yes, I did It just before write this post to be sure.I think that you could easy replicate the error adapting a lil bit the "Trading System Optimization by Asset" example template.

Hello Everyone!

I am having problems to import "sklearn" when I submit my systems that results in the following error in the HTML log, and end filtered cause of it:

It's important to say that when I debug the code in the jupyter notebook (and in local too) it works perfectly. And also consider that a few days ago I was uploading systems that also uses this library and were processed without any problem.

I am thinking about any recents changes taken place in the environment or the OS that can affect.
Any help would be apreciatted @support

Regards!

Thanks @dark-yellowjacket for post your solution for the optimizer, it works fine for me but could you please go deeper explaining how do you implement the optimized obtained parameter values in the final strategy. I have tried several methods (even in several computers) , obtaining always errors.
For example using this template provided by Quantiacs (where i call to "Strategy" I use the same previouslly optimized, and the config.json is the output asset by asset obtained after optimization):

import json
import xarray as xr
import qnt.backtester as qnbk
from Strategy import *

def optmized_strategy(data, config):
    results = []
    for c in config:
        results.append(strategy_long(data, **c))
    # align and join results
    results = xr.align(*results, join='outer')
    results = [r.fillna(0) for r in results]
    output = sum(results) / len(results)
    return output


config = json.load(open('config.json', 'r'))

# multi-pass
# It may look slow, but it is ok. The evaluator will run only one iteration per day.
qnbk.backtest(
    competition_type='stocks_nasdaq100',
    lookback_period=365,
    strategy=lambda d: optmized_strategy(d, config),
 # strategy=strategy_long, # you can check the base strategy too
    start_date='2006-01-01')

It rises the following error:

Reloaded modules: Estrategia
fetched chunk 1/5 0s
fetched chunk 2/5 0s
fetched chunk 3/5 0s
fetched chunk 4/5 0s
fetched chunk 5/5 0s
Data loaded 1s
Run last pass...
Load data...
fetched chunk 1/1 0s
Data loaded 0s
Run strategy...
Traceback (most recent call last):

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\spyder_kernels\py3compat.py", line 356, in compat_exec
    exec(code, globals, locals)

  File "c:\users\luispc\desktop\quantiacs\q18\prueba.py", line 39, in <module>
    start_date='2006-01-01')

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\qnt\backtester.py", line 291, in backtest
    result = strategy_wrap(data, state)

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\qnt\backtester.py", line 270, in <lambda>
    strategy_wrap = (lambda d, s: strategy(d)) if args_count < 2 else strategy

  File "c:\users\luispc\desktop\quantiacs\q18\prueba.py", line 37, in <lambda>
    strategy=lambda d: optmized_strategy(d, config),

  File "c:\users\luispc\desktop\quantiacs\q18\prueba.py", line 22, in optmized_strategy
    results.append(strategy_long(data, **c))

  File "C:\Users\LuisPC\Desktop\quantiacs\Q18\Estrategia.py", line 16, in strategy_long
    data = data.sel(asset=[asset])

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\xarray\core\dataarray.py", line 1337, in sel
    **indexers_kwargs,

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\xarray\core\dataset.py", line 2505, in sel
    self, indexers=indexers, method=method, tolerance=tolerance

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\xarray\core\coordinates.py", line 422, in remap_label_indexers
    obj, v_indexers, method=method, tolerance=tolerance

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\xarray\core\indexing.py", line 120, in remap_label_indexers
    idxr, new_idx = index.query(labels, method=method, tolerance=tolerance)

  File "C:\Users\LuisPC\.conda\envs\qntdev\lib\site-packages\xarray\core\indexes.py", line 242, in query
    raise KeyError(f"not all values found in index {coord_name!r}")

KeyError: "not all values found in index 'asset'"

I tried to explain this problem about the implementation in the Backtester in another forum thread time ago, without getting a valid answer, therefore I would appreciate any idea you can give me on this matter.
...Otherwise I am afraid that I will not present algorithms for this contest (Sadly )
Regards.
Luis G.

Hi @support !
Any updates about this?
Thanks in advance

Thank you very much @support
Let me know if you upgrade the template please

Hello @support ,

Sorry for the delay in my answer.

Just to be sure...When you took the example provided in the templates for futures, and modified it for stocks, did you also tried the final code for the strategy with multi-pass backtester? Because is in there where i get error.

I have tried it, even in jupyter notebook, obtaining error as result... I will keep trying and let you know if anything change.

Yes, I did It just before write this post to be sure.I think that you could easy replicate the error adapting a lil bit the "Trading System Optimization by Asset" example template.

Hello everyone,
I'm getting familiar with the Q18 contests and I'm encountering some problems when trying to reproduce systems similar to those already presented in previous editions, specifically I can't pass different parameters for each asset as I did in other contests.
I have tried it in 2 ways, directly through a dictionary:

...and from a json config:

recovering values like this:

I can call this method and then check the stats calling qnstats.calc_stat(), everything is perfect until i try to call de backtest method:

When I obtain this error:

¿Any ideas?

Congratulations to all the winners!
And perseverance for those who haven't been so lucky this time.

@support I have exactly the same problem, All my candidates aré suddenly unticked por the competition, and more than 50% of my strategies doesn’t appear now in the candidates tab

Hi again @support,
All my past submissions have recently disappeared from the competition >candidates tab, how can I select them for the futures context?
Or will they participate automatically in parallel over the original datasets as you explained before? In this case, how could I monitor them during the evaluation period?
Thanks one more time