Does this affect my backtest data?

 

Hi,

I noticed something weird with this chart and compared with other broker.

Other broker is having the opening near the close of the previous bar.

Does this affect backtesting with this broker?

Files:
 
Each broker has its own quotes and execution of exact same trades on two brokers won't have the same result. 
As far as backtesting is concerned the most reliable backtest method is the "Every tick based on real ticks". To do this type of backtest you need to have purchased real ticks for the selected symbol. Even in that case it does not mean that you get exact same results in live. Because the historical ticks are gathered from other brokers.