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This study shows the trend in terms of a heat map using three simple colors, green for an uptrend, red for a downtrend and yellow for a possible reentry or reversal point.
There are two lines, one at the 20 ma and the second at the 50 ma which are the two most popular moving averages references and where there are high possibilities of support/resistance and reversal points.
The upper yellow line stands for the 20 ma, the lower yellow line for the 50 ma.
This study requires no parameters, so it is kept simple and user friendly.
```// Madrid : 03/Aug/2015 : Heat Map : 2.0
// This study shows the trend in terms of a heat map.
// Two lines define the limits where a possible reversal can occur.

src = close

ma05 = ema(src, 05)
ma10 = ema(src, 10)
ma15 = ema(src, 15)
ma20 = ema(src, 20)
ma25 = ema(src, 25)
ma30 = ema(src, 30)
ma35 = ema(src, 35)
ma40 = ema(src, 40)
ma45 = ema(src, 45)
ma50 = ema(src, 50)
ma55 = ema(src, 55)
ma60 = ema(src, 60)
ma65 = ema(src, 65)
ma70 = ema(src, 70)
ma75 = ema(src, 75)
ma80 = ema(src, 80)
ma85 = ema(src, 85)
ma90 = ema(src, 90)

maPairColor(ma1, ma2) =>
change(ma1,3)>=0 and change(ma2,3)>=0 ? green :
change(ma1,3)<=0 and change(ma2,3)<=0 ? red   :
yellow

plot(18, style=columns, color=maPairColor(ma05,ma90), histbase=17, editable=false)
plot(17, style=columns, color=maPairColor(ma10,ma90), histbase=16, editable=false)
plot(16, style=columns, color=maPairColor(ma15,ma90), histbase=15, editable=false)
plot(15, style=columns, color=maPairColor(ma20,ma90), histbase=14, editable=false)
plot(14, style=columns, color=maPairColor(ma25,ma90), histbase=13, editable=false)
plot(13, style=columns, color=maPairColor(ma30,ma90), histbase=12, editable=false)
plot(12, style=columns, color=maPairColor(ma35,ma90), histbase=11, editable=false)
plot(11, style=columns, color=maPairColor(ma40,ma90), histbase=10, editable=false)
plot(10, style=columns, color=maPairColor(ma45,ma90), histbase=09, editable=false)
plot(09, style=columns, color=maPairColor(ma50,ma90), histbase=08, editable=false)
plot(08, style=columns, color=maPairColor(ma55,ma90), histbase=07, editable=false)
plot(07, style=columns, color=maPairColor(ma60,ma90), histbase=06, editable=false)
plot(06, style=columns, color=maPairColor(ma65,ma90), histbase=05, editable=false)
plot(05, style=columns, color=maPairColor(ma70,ma90), histbase=04, editable=false)
plot(04, style=columns, color=maPairColor(ma75,ma90), histbase=03, editable=false)

hline(15, color=yellow, linewidth=1, linestyle=dotted)
hline(09, color=yellow, linewidth=1, linestyle=dotted)
```
Looks good, I'll try it out.
Nice coding.
IvanLabrie
Thank you.
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