Algos not performing since Mid September?

I got into forex trading about 4 months ago, but I’ve programmed for 20 years. Building momentum indicator based algos came quite naturally to me and when I started live tested as well as back testing in late August the results were phenomenal. Even back a full year most performed very well, and through June to mid September the results were exponential. However, after September 18th, it seems the typical trends failed to act as they normally would and have continued to be erratic to date.

Am I the only one that found this with algos based off of momentum based indicators? (i.e.) EMA, Stoch, RSi, etc.

From June to Sept 15th using 1/20th margin req lot sizes, I was able to do 100%+ per week on demo testing, however since I had only just started I hadn’t put in live money. My first live account went active September 20th and I swear I jinxed the market lol