Get historical data dynamically before cerebro.run()

[Federico Bld]

I have to lunch strategies with serveral feeds with different timeframes.
I didn't find the way to get "minpediod" to calculate "hist_start_date" variable.

# My formula shuld be look like:
minutes_of_one_candle = get_compression_in_minutes_from_timeframe(assetTimeframe,assetCompression)
minperiod = # I don't know how to retrieve the "minperiod" from the strategy with custom 
timeAgoInMinutes = minperiod * minutes_of_one_candle 

Follows the complete code

strategies_list = [sma_200minperiod_strategy,
                   ema_5minperiod_strategy]
assets = [
    ['ticker1', 1, 'minutes',]
    ['ticker2', 30, 'minutes',]
    ['ticker3', 1, 'hours',]
    ['ticker4', 1, 'days',]
]
for strategy in strategies_list:
    cerebro.addstrategy(strategy=strategy, **get_strategyParams(strategy))

    for assetName in assets:
        dataname =assetName[0]

        assetTimeframe = get_bt_TimeFrame(assetName[2])
        assetCompression = get_bt_compression(assetName[1])
        assetCompression_in_Minutes = get_compression_in_minutes(assetTimeframe , assetCompression)

        minutes_of_one_candle = get_compression_in_minutes_from_timeframe(assetTimeframe,assetCompression)        
        minperiod = # I don't know how to retrieve the "minperiod" from the strategy with custom parameters
        timeAgoInMinutes = minperiod * minutes_of_one_candle         

        hist_start_date = datetime.utcnow() - timedelta(minutes=timeAgoInMinutes)

        data = store.getdata(
                             dataname=dataname,
                             timeframe=assetTimeframe,
                             compression=assetCompression,
                             fromdate=hist_start_date,  # <========
                             ohlcv_limit=250,
                             drop_newest=True)

        cerebro.adddata(data)

How can I get minperiod to set fromdate = hist_start_date before cerebro.run()?