In the end I discovered that I had better listened to what the others had to say. All the answers to this post were ment to help me, although I was too stubborn and continued.
I have come to the conclusion that I have been scammed. The broker was manipulating the trades server side, there seem to be various tools for that.
More info here:
Is my Forex broker manipulating my trades?
I will post my story here for those who are on the same path:
I started Forex trading with Capital Hall. They guided me through installing MetaTrader4 using the tool AnyDesk to control my pc and show me what trades to do.
My first deposit was $250 which quickly rose to $350 so I withdrew $50 to test if they would let me. Then I deposited $1000 and the total amount reached quickly to $2100. I would get a call from this guy daily where he instructs me to buy NAS100 or UsOil or some other commodity.
At this point I started becoming suspicious because this went all too well. I researched the company online and found only positive reviews. I read their documents and it said I could not go into debt, what the employees told me as well. I posted this question here and asked friends what they thought and everyone told me it's a scam. So I thought I should try to withdraw using a story about a friend who wanted to invest but first see me withdraw $1000.
The $1000 was nicely withdrawn into my Bitcoin wallet, but now the guy started asking me to deposit more funds which I didn't. At a certain point he would not call me or send me WhatsApp messages anymore, except sometimes when he asked me to please deposit everal thousands promising I would have it returned and doubled in a few days. Then he told me that he has a situation in his private life and I did not hear from him for some time.
After some time I got called by another guy who said he was going to continue the trading from the point where his colleague had stopped. Quickly my $1100 rose to about $1650 and I was quite happy.
Then he explained to me that with more credit I would be making money even quicker. And that his company was making a special offer because it was the end of the month and if I would deposit $2000 now I would get $4000 worth of credits. When I declined at first he reduced his offer to 'deposit $1000 and get $2000 credit' which I took.
So I deposited $1000 and he told me to buy a stock. This time the trade would quickly drop to $-1500. After the weekend he called me again and said he has a huge opportunity if I deposited $3000 now. I eventually agreed to deposit $1500 instead and got $3000 in credits. Then we bought another stock which then dropped to $-5000 while the total balance reached $-8000.
Now I got a call from this guy again and later his friend saying that I have to deposit $2500 now to save my account. I almost tried to transfer more but this went wrong. Now this guy and his friend kept calling me and he wants to login to my crypto wallets. He says that I have to call my friends and family to borrow their money. When I kept saying that I would not do that he hung up on me. My account was then closed.
Later I discovered that there were scam warnings about this company:
Lost almost $3000.