History Quality

 
I am running Backtest on GBPUSD from 1st jan 2010 till 31dec 2023.
And i have receiving history quality of 7% only.. tried using multiple pcs but still get the same 7%.

Kindly guide me how to achieve 100% . 
 
The further you go back in time the less history quality you get. This is what your broker offers you. Some brokers have historical data for sale. You may purchase if they offer it. 
 
an alternative would be to use MT5 to run your backtest.. select "every tick based on real ticks", this should give you quality data with over 90% from any broker.. You couls also try downloading Tickdata suits, you can get free clean Dukascopy data from on there within the 14 days free trial period, use this data to create a custom symbol on mt4 or mt5 and Voila 😅, clean quality  data