In most cases, accuracy remains around 60-70% on the long term. ( Higher the period, higher the chances of maintaining this accuracy )
In most of our latest version ( v2 and above ) we have Target: Stop Loss ratio of 1:1 Even with 60% accuracy chances of profit are high.
No matter whichever system you follow, there would be some days when there will be losses. Even legends make losses sometimes.
If you are not getting around 60% accuracy in your script then…
1. like legends says, love your script but never marry it. Try changing the script and track another script
2. try changing indicator version as some script works well in the older version
3. take a halt in trading for a few days as sometimes the market may behave abnormally on some news