Confusing Problems with Margins and Orders on IG Trader App and MetaTrader 4 App

[kayabahadir90]

First of all, I'm sorry if the question is asked before. I could not find anything regarding my issues. Please someone who is experienced and well-informed about below topics make comments. 

I'm new to IG and forex world so I have a few questions and maybe a problem with the orders and margins. 

I have 2 demo accounts and one of them for IG Trader and one of them is IG MetaTrader 4 account. 

When I open 1 lot size long position for XAU/USD on MT4 it uses $100 margin. The equity is $10k in account. 

However when I open the same lots on IG Trader app it requires a margin level of not $100 for 1 lot size but around $1018.

Question 1: For what is this difference on the same broker, 2 demo accounts and the same leverage and the same lot size? 

Another thing is that when I open 3 lots long position it uses $300 margin. After that position I open 3 lots short position. Interestingly, used margin decreases to $60 instead of $600 for 6 lot size. 

Question 2: is this a bug, problem or is it normal? If it is normal, opening a total of 10 sell and buy lots at the same time will not require high margin. Right? 

Another things is that. On MetaTrader 4 I can open many positions on the same fx pair whether it is buy or sell and all of them are are processed separately. However On IG Trader app when I open positions on the same fx pair they are automatically merged at the closure. For instance, I buy gold at 2020.25 and then sell gold for 2020.24. Assume the market is coming downtrend. When the market hits 2020.25 it buys and then sells at 2020.24 and writes a small loss. 

However, on MT4 these 2 positions aren't merged and if the market goes upward it gets profit from long position, if it goes downward it gets profit from sell position. 

I can close one of them with profit and then may wait for other to go otherwise again.

Question 3: Anyway, what is the difference for this? MT4 doesn't merge positions but IG Trader merges them. I like some features of IG Trader but because of these issues I feel cold for it. 

Question 4: Are these problems just related to demo accounts or will it be the same on real account? I haven't used real account since it is still in activation process.