EMA crossover

[CraftyPicks]

I've been looking for a 3 types of EMA crossover indicator but have been unlucky.

Example, i would like a buy/sell indicator signal when these conditions are met.

If 21 EMA crosses 50 EMA while 200 is trending up then i get a buy signal.
If 200 EMA crosses 50 EMA and 21 on an uptrend then i get sell signal.

Thick blue line is the 200 ema
Yellow line is the 50 ema
thin blue line is the 20 ema

i would like a signal every time these conditions are met

 

[mashume]

I think I've got your conditions coded correctly, though the second one for sell signals took a few reads through to get.

declare upper;

input fast = 21;
input slow = 50;
input filter = 200;

def fast_ema = MovAvgExponential(price = CLOSE, length = fast);
def slow_ema = MovAvgExponential(price = CLOSE, length = slow);
def filter_ema = MovAvgExponential(price = CLOSE, length = filter);

plot buy = if fast_ema crosses slow_ema and filter_ema > filter_ema[1] then low else double.nan;
buy.SetPaintingStrategy(PaintingStrategy.ARROW_UP);

plot sell = if filter_ema crosses  slow_ema and fast_ema > fast_ema[1] then high else double.nan;
sell.SetPaintingStrategy(PaintingStrategy.ARROW_DOWN);

-mashume