The EA continues to work (or not work) for the same reason your car engine continues to work (or not work). If you run out of gas, it's not the engine's fault, just like if you run out of margin, it is not the market's fault.
It is not uncommon for people to have full awareness of some kind of truth and simply choose not to act on it. But that is usually fear taking advantage of our ignorance, and then perpetuates the fear and the ignorance. So we continue to make assumptions that the market somehow changes. Changes into what?
The underlying market fundamentally stays the same. There are buyers and there are sellers and each come together at an agreed price. That price can either be higher than, lower than, or equal to the previous price. Mechanically, a trading strategy only needs the fundamentals in order to operate "successfully". Everything else is just opinion or a point of view, and is irrelevant to market price action. If someone was so adamant about their point of view, why not take action, place a trade (manually or automatically), and see what happens?
In fact, more volume is better for the entire trading community. You never worry about the air running out of oxygen despite all of creation that depends on that oxygen, or the ocean running out of water despite how many mammals use it. Why worry about if the forex market will run out of money? Many conspiracy theorists love to boast about how one day the dollar will collapse. Fiat currency is a function of want; nature already provides you with everything you need. As long as humans have wants, fiat currency [in one form or another] is here to stay. I don't see humans giving up their wants anytime soon.
The market truth is already there, just waiting for you to trade. I always recommend removing what is not true, which is all you can do at the level of the mind. Practicing "The Four Agreements" and eliminating "The Voice of Knowledge" [Don Miguel Ruiz] is my favorite tools for doing this.
