Displaying Result from Data Frame from Function

[eagle]

Hello everyone!
Still working on this problem. I manage to get an output: 4523.316192626953
based on some changes i made. Ideally, the function "enter" in my code will take a position when the function "momentum" is 1. That's where i struggle (and possibly in some other areas). These are the changes i made:

n_share = 50# Number of shares bought per batch
cash = 10000
portfolio_portion = .5  # Max proportion of portfolio bet on any trade
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def enter(direction):
    position =  pd.DataFrame(index =data_values.index)
    position['Price'] = data_values['Adj Close']
    for index, row in position['Price'].iteritems():
        batches = np.floor(cash * portfolio_portion) // np.ceil(n_share * row) # Maximum number of batches of stocks invested in
        trade_value = batches * n_share * row # How much money is put on the line with each trade
        return trade_value
if __name__ == "__main__":
    result = (enter(momentum(data_values, 2)))#direction = momentum(data_values, 5)
    print(result)