Code Trend Period and BollingerBandMACD

I have a couple indicators from ThinkorSwim(script) i'd love someone to code for MT4.

Trendperiod:

TrendPeriod:

This one again is just a typical EMA offered by TOS but just offers a different visual way of seeing things. When short term is above longer ema it draws line at the (1) mark. If vice versa it draws line below at (-1). If you can could you make it so when above its green and when below its red vs how i currently have it its all just one color?

declare lower;

input fastLength = 7;
input slowLength = 15;

plot Periods = sign(ExpAverage(close, fastLength) - ExpAverage(close, slowLength));

Periods.SetDefaultColor(GetColor(1));

MACDBollingerBand:

Here we have a MACD plotted onto its own Bollinger Bands

declare lower;

input price = close;
input BBlength = 10;
input BBNum_Dev = 1.0;
input MACDfastLength = 12;
input MACDslowLength = 26;
input MACDLength = 5;

def MACD_Data = MACD(fastLength=MACDfastLength, slowLength=MACDslowLength, MACDLength = MACDLength);

plot MACD_Dots = MACD_Data;
plot MACD_Line= MACD_Data;

plot BB_Upper = BollingerBandsSMA(price = MACD_Line, length=BBlength, Num_Dev_Dn=-BBNum_Dev, Num_Dev_Up=BBNum_Dev).UpperBand;
plot BB_Lower = BollingerBandsSMA(price = MACD_Line, length=BBlength, Num_Dev_Dn=-BBNum_Dev, Num_Dev_Up=BBNum_Dev).Lowerband;
plot BB_Midline = BollingerBandsSMA(price = MACD_Line, length=BBlength, Num_Dev_Dn=-BBNum_Dev, Num_Dev_Up=BBNum_Dev).MidLine;

BB_Upper.SetDefaultColor(color.gray);
BB_Lower.SetDefaultColor(color.gray);
BB_MidLine.SetDefaultColor(color.gray);
BB_MidLine.setStyle(curve.SHORT_DASH);

MACD_Line.setDefaultColor(color.white);

MACD_Dots.setStyle(curve.POINTS);
MACD_Dots.setLineWeight(2);
MACD_Dots.assignValueColor(if MACD_Line>MACD_line[1] then color.green else color.red);

plot zero = 0;
zero.assignValueColor(if MACD_line<0 then color.red else color.green);

zero.setLineWeight(2);