GetTicks() gives only 200 ticks in backtesting mode — how to get more?

I am implementing a method to calculate Maximum Favorable Excursion (MFE). To achieve that I need all ticks from time of opening position to closing position, so I can see where the price moved in between. As seen below, when calling

var ticks = marketData.GetTicks(ht.SymbolName)

I get only 200 last ticks so it will not cover my desired time period even when position was opened and closed on the same day. 

How to get more ticks? Or maybe it is because this is backtesting running mode?

I have searched the documentation and forum. This topis was discussed but I didn't found exact answer.