Quote from alex.samant:
you have to understand that most strategies correspond to certain market conditions. by strategies i mean systems that rely on a fixed set of rules.
however, the only "strategies" that never go out of order are the simple ones based on price alone (reversals at S/R, buying retracements into new highs/lows, etc)
the more indicators, the more specific the strategy gets and the higher chance that the strategy will fail when slight market characteristics begin to change.
and that is all because most indicators are linear and meant to produce a result bar to bar, while the human eye and brain are more capable of analyzing and judging than formulas.