, you raise an interesting point allow me to offer some insight.
First, I think it is valuable to separate pips and money. The value of a pip differs from one pair to another and from one broker to another, also the value of the pip changes according to the conditions. The value of the pip should be found either on the broker's page or more likely on the fine print in the Terms&Conditions. Calculating a $ return with pips just doesn't work.
Second, you have to account for trading costs which can vary again from pair to pair and broker to broker. The most common commission is the spread which even if the broker says is fixed, it is not. The second cost will be the swap which should be easy to calculate(interest rate difference), account for the fact that on Wednesday the swap is triple for every broker.
Third, the strategy assumes that you have 20 wining trades of 50 pips. Take into account that your buy orders open at Ask and sell orders open at Bid (the difference between them is the broker's spread). Consider that you have a 5pip spread, you will have to have 20 winning trades of 55 pips. Your Tp and SL are the inverse of your order( if my order is BUY then TP&SL are PENDING SELL) and they also close at ask and bid so you will need to add 5 more pips. In total you have 20 trades of 60 pips, quite the difference. (To see the ask line go to mt4 - Options - Common - Show ASk line)
Forth, the strategy assumes that you have a 50% chance of hitting that TP. On first trade you have theoretically 50% of hitting TP. However, your SL is closer than your TP (odds of TP go down), the bid/ask spread and method of orders closing make it in such way that you are more likely to hit the SL. In the standard trade, you actually have a <50% of hitting TP. (Example: we all now the Risk Reward Ration of 1:3. I risk 1 unit to make 3. In Forex this ratio comes down to 1:around 2.1 because of the costs).
Fifth, you mathematically have a 1 in 20 chances of getting all the trades right. First trade you have <50% change to get it right, the second you have <25% etc. 1/20=0.05% (Assuming you are perfect)
Sixth, the 1:500 leverage assumes that the broker lends you 500x times the amount that you deposit. Why would a stranger lend you 500x the amount? Which bank does that? Leverage over 20x was banned is EU and CFDs(What we use for currency trading) was banned in US. There is a reason for this which I will not go into detail, you can find it on the internet. Your 1:500 raises your risk factor because with every trade you pay the broker for the 500x that you receive (no broker will ever admit this, but this is the reason you can get 500x your account, it's basically a loan).
In conclusion, the chances of doing that are next to nothing and even if it works the first time, the second time will definitely be a bust.
If however it works consistently and you can prove it, give me a PM and I.ll personally give you me account to trade.