Normalization on open price

[i7p9h9]

when you already know I think normalization on open price is incorrect for this task. In real life, you can not buy on open price, when you already know high and low, from my point of view for real testing you should normalize for the close price (open for next candle) - if you do this - results will be significant worst. Have I made a mistake in my reasoning?

[0xdarkman]

from the publication:

1. "The main weakness of the current work is the assumptions of zero
   market impact and zero slippage."

2. "Zero slippage: The liquidity of all market assets is high enough that, each trade can
   be carried out immediately at the last price when a order is placed."