Risk management: disable entries if X number of other trades are opened

I have an idea that I think is useful to allow only a certain charts of tables to trade at a time.

When we have a number of charts with different strategies and currencies on the same capital, then if a trading opportunity appears and the deal is entered and if (X = 1) then the rest of the strategies will be paused if they are not open deals.

I do this manually many times when I find a drawdown on a table eg.

Thus we can take advantage of different opportunities on different currencies while mitigating the risk to the capital.