What do you mean by conversion? Because since I made this - https://fxdreema.com/converter - some people tried it to convert .mq4 files generated with fxDreema with it... which gives some errors, but there is no need to do it at all.
So, originally in MQL5 the running trades are called "Positions". Then they added this new "Hedge mode", so now MQL5 can work in the old "Netting mode" and in the new mode. I made fxDreema in 2011 and back then we only had positions, so basically the names are old fashioned. I wanted to wait for some time before renaming every "position" word to "trade".
Otherwise some months ago I rewrote all blocks, so that they can be as equal as possible in MQL4 and MQL5. The names remained different with that "position" word, but the blocks should do the same in MT4 and MT5 (hedging mode). There are some differences in some indicators or some extra blocks for MQL5, but the most used blocks should be equal.