I do not know if this is right thread but I want to suggest two things for both Metatrader 4 and Metatrader 5
1. Volume (CTRL +L) to show buying and selling volume and to be colored (MT4 and MT5) and Tick Volume ( MT5)
2. HLC price representation on chart. So far there are only Bars, Candles and Line and they are in form OHLC.
Many platforms have both of these features I listed above. I hope MQL5 Ltd will take this in consideration and make changes as expected.