TMA centered recalculates/repaints. That makes all the analysis that is taking the past "signals" into consideration wrong, since they did not happen there and then, but much later. All those should be followed in run-time live testing and all will be clear what exactly is happening and why "signals" that look so good on historical data on recalculating/repainting indicators can not be used as signals.

https://www.forex-tsd.com/forum/debates-discussions/14243-triangular-moving-average-tma/page49