REVISION UPDATE 4/7/18
Fixed the repainting / over-alerting problem by upgrading the script's Pine Editor code to version 3 (previously was version 2), and by adding / adjusting a few of the new variables available in version 3. The 'Ninja Signals' script and backtesting strategy are even better now, including for manual traders and those using automatic trading software (e.g. Gunbot), since the buy and sell alerts are more precise now. Thanks to 'Brian S.' and 'MVPMC' for pointing this problem out to me so I could fix it. I will extend all current users' free 7-day trials by restarting the trials today, now that the problem has been fixed.