Hi @mykyta45,
Leverge is used when you want to optimize your strategy. Bigger leverage you can open bigger volume.
Example: Your balance is 1000. Using 1:100, you can open hypothetically 1000 x 100 = 1 lot. When you have 1:50 it will be 1000 x 50 - 0.5 Lot.
So higher your leverage, bigger volume you can trade. Bigger volume means bigger profit or loss.
When you are still trading 0.01 lot, as beginner, Leverage wonât be useful for you.
Leverage is useful when you already have good strategy and base on your strategy, you have developed a good trading plan, completely with risk and money management.
Once you know exactly your risk management, leverage will be useful.
Example having 1000 USD. You want to earn 20% profit.
Let say your strategy will give you profit 2 USD each position / 0.01 lot.
Having levarage 1:50 you will allowed to open up to 0.5 lot. So your max profit will be 50.
Let say each month you can only trade 2 times, your maximum profit will be 100, which is 10%. If you are really confident with your skill, you can request higher leverage for example 1:100. So you will be allowed to open max 1 lot. Using 1 lot you can have 100 / opportunity, in a month you can have 20%.
So, the leverage will boost your performance by using the same amount of money.
But thing is not this simple. Bigger leverage will also dangerous. By using 1:50, your draw down will also limited by max trading volume, You will be farther away from margin call and stopped out level. Itâs kind of protection for you.
When you want to use bigger leverage, you have to calculate properly volume, risk and target profit. If you are still beginner, use 0.01, leverage is nothing to be concerned.
Even when you are given 1:200000, it doesnât effect you. Just be sober when open a position 
Above explanation is just illustration. 1000 with 1:50 wont be enough to open 0.5 lot. There are margin for opening position, margin to maintain position. So by having 1000 and 1:50, realistically can open open around 0.2 lot.
I usually need 1:200 to trade aggressively on a well regulated broker. But you need to go through some questioners to have it available. Using offshore broker, you can also have bigger leverage. Some can offer you 1: unlimited. Basically you can earn 100% or die miserably at once
Not a healthy approach.
Offshore broker isnât always bad. They just have legality to let their clients to be exposed to higher risk in financial activity. This is the truth behind offshore broker.
Good Regulation doesnât always mean the broker is good or safe.